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Designing Interfaces

July 20, 2009 by Roy Johnson

navigation, interactivity, and graphic design techniques

O’Reilly have recently taken to adding colour to their publications – and it works. The pages are more visually interesting, and the reader gets a more accurate picture of what will appear on screen. This book is attempting to get down to the fundamentals of interface design – How many clicks, how many screens do you need to see before you get to what you want? In fact Jenifer Tidwell starts of with usability issues, showing what real users do and ask of interfaces. Then she starts considering design, starting from the top and most general level – the organisation of content, or information architecture. This also includes consideration of the user interface or screen.

Designing InterfacesThe main strength of her approach is that she is very thorough. Her examples include different types of software and hardware. A design that works on a computer screen will have to be adapted if it’s going to be read on a mobile phone, and if viewed on a TV screen, you won’t have a mouse for navigation. She deals with web pages, installation programs, spreadsheets, and even graphic design packages – but keeps these issues in mind at all times.

Next comes navigation which deals with methods for leading the user through the contents. These include navigation panels, sequence maps, breadcrumb trails, and colour coding.

The next level down in terms of detail is page layout. This introduces elements of graphic design in arranging both content and navigation. This where the going can get rough. The layout part is easy if you’ve got a reasonable eye for design, but after that you need to choose between columns and tabs, and fixed width and liquid pages. She explains all the options, with the advantages and drawbacks of each.

Then comes what she calls the ‘verbs’ of the interface – objects such as buttons, action panels, and menus which make things happen. I was pleased to see that she gave as an example of bad design just how difficult it is to cancel a print job in Windows.

It’s fairly obvious that her principal interest is in information graphics – maps, tables, and graphs plus all their variants. Here she covers the ground which Edward Tufte has made his own – but you’ll find her prose easier to understand. She covers tooltips, expandable views, and what she calls ‘data brushing’ whereby the user can select which part(s) of a collection of information to view on screen.

Then comes a section on the much trickier issue of designing interactive choice lists. There are all sorts of possibilities here – forms, checkboxes, toggle buttons, dropdown lists, and so on – but the important point is that she illustrates them all, pointing to their advantages and weaknesses.

She even covers the design of interfaces for editors – such as text and image editing programs. Not many people outside a technological elite few will need to know these matters, but I found it instructive to see the general principles behind so many of the drag and drop or click and resize functions we come across all the time.

She finishes with a chapter any designer will enjoy – dealing with the graphic design of what appears on screen. This involves colour, spacing, typography, balance, and every other facet of visual rhetoric to make a visitor wish to stay on the site. I picked up some useful tips on hairlines and rounded corners here.

It’s a handsome, well-designed book – as befits its subject – and she includes a generous bibliography. O’Reilly have done her proud.

© Roy Johnson 2005

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Jenifer Tidwell, Designing Interfaces, Sebastopol, CA: O’Reilly, 2005, pp.331, ISBN: 0596008031


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Filed Under: Graphic design, Information Design Tagged With: Computers, Designing Interfaces, Graphic design, Information design, Navigation, Web design

Developing Feeds with RSS and Atom

June 26, 2009 by Roy Johnson

web services for bloggers

What’s a ‘feed’? And what are RSS and Atom? Answer – a feed is the automatic distribution of information from someone’s blog or web site, and RSS (Really Simple Syndication) and Atom are the technologies which deliver this information to your desktop. A friend recently emailed me someone’s blog entry. It discussed in excited terms the emergence of Web 2.0 or the Semantic Web. This is the next development for the Web whereby computers will be able to understand the meaning of and the relationships between documents and other data. Automatic web ad blog feeds are one part of that development, and Ben Hammersley’s timely manual is an introduction to the technology involved.

Developing Feeds with RSS and AtomHe is a very active technology journalist and blogger, and he knows whereof he speaks. First he explains the history of how there came to be two competing sets of standards – which is more interesting than you might imagine from that description. The advantages of accepting automatic feeds from others are fairly obvious, but why supply your own? Hammersley is in no doubt: it increases traffic to your site; helps with search engine rankings; improves relations with your users; and makes the Internet an altogether richer place, pushing semantic technology along and encouraging reuse.

For reading other people’s feeds, he describes both the available web-based readers and downloadable software. You can even receive feeds as email or on a mobile phone.

The central section of the book describes a variety of feeds and shows you the scripts you might need to implement them I say ‘might’, because for most people all this will be done for you using templates at sites like Blogger and Moveable Type. However, knowing the code gives you more control – and it isn’t all that complicated if you know some basic HTML or XML.

Assuming that you wish to publish a feed from your own blog or web site, he devotes a handy chapter to showing you how to maximise the chances it will be circulated and read.

He ends by offering a collection of recipes for creating and using feeds to do things such as keeping track of “404 Page Not Found” errors on your web site; downloading your favourite comic strip each morning; generating your own wish list at Amazon; automatically checking web pages are W3C valid; and receiving regular weather forecasts for your area.

He ends with what is one of the hallmarks of these O’Reilly publications – a comprehensive and annotated list of tools and resources. Most of these are free – so if you are interested in receiving or publishing feeds, you can start right now.

© Roy Johnson 2005

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Ben Hammersley, Developing Feeds with RSS and Atom, Sebastopol: CA, O’Reilly, 2005, pp..253, ISBN 0596008813


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Filed Under: Computers Tagged With: Atom, Computers, Developing Feeds with RSS and Atom, Media, RSS, Technology

Digital Art History

June 30, 2009 by Roy Johnson

Teaching and learning art using IT

This is a collection of academic conference papers which look at the ways in which digital art history and the use of computers is affecting the ways in which art is both taught and studied. The papers cover issues such as the storage, access, and searchability of images; ownership and copyright. iconography and classification, and the analysis of art works using Computer Aided Design. There’s an account of a multi-media project for instance, Colour and Communication in 20th-Century Abstract Art, which teaches issues of tone, tint, and hue by making comparisons with music which are included as audio files alongside interactive exercises.

Digital Art HistoryNext comes a web-based project called The Cathedral as Virtual Encyclopedia – a virtual panoramic tour of Chartes cathedral. The really interesting and ambitious feature here is that the authoring team, lead by Stephen Clancy, have been digitally manipulating the panorama shots using Macromedia Director to produce a thirteenth-century version of the tour.

This is followed by an account of creating a multimedia database of the source materials archived by Georg Morgenstiern, professor of Indo-Iranian languages at the University of Oslo, Norway. The resulting collection of photographs, sound recordings, and movie clips can be seen at www.nb.no.

There is a short encomium for computer gaming which could safely have been left out of the collection. More interesting is an account of experimental new media art at the University of the West of England in Bristol – though the emphasis is on problems of curation rather than the ‘exhibits’ themselves. This is also true of an essay on the creation of a visually searchable database of images at London Guildhall.

The centrepiece of the book shows how computer graphics and visioning techniques can be used in the scientific analysis of paintings. Once the examples have been digitised using CAD software, new versions can be generated from different points of view; partly occluded objects can be completed; shapes and objects can be analysed; and a 3D version of the scene can be generated.

They show an amazing three dimensional reconstruction of Masaccio’s Florentine fresco, The Trinity. This paper is the work of three scholars in art history and engineering science working collaboratively at the University of Oxford and is probably the highlight of the collection.

As an e-learning author myself, I would sometimes have welcomed a little more technical detail, but there’s certainly enough here to stimulate anybody who want to see what’s possible in harnessing the power of IT to the teaching and learning in visual arts.

© Roy Johnson 2005

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Anna Bentkowska-Kafel et al (eds), Digital Art History, Bristol: Intellect, 2005, pp.118, ISBN 1841501166


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Filed Under: Art, Media, Online Learning Tagged With: Art, Computers, Cultural history, Digital art, Digital Art History, Education, New media, Online learning

eBook Readers – compared

May 15, 2010 by Roy Johnson

a comparison chart of ebook reader features and prices

eBook readersKindle eBook Reader
Main features: 6″ diagonal E Ink® electronic paper display – weight 10 ounces (290 grams) – 1.5 GB storage – USB 2.0 port – supports multiple ebook formats – download via free built-in WiFi – 2 weeks battery life (reading) – holds up to 1,500 books 

UK=£176
US=$259

 

eBook readersSony Reader eBook Space
Main features: 6″ diagonal E Ink® electronic paper display – weight 260 grams – 192 MB storage expandable via MemoryStick or SD Card – supports multiple ebook formats – download with USB connection to PC via broadband – rechargeable battery – holds up to 160 ebooks 

UK=£275
US=$148

 

eBook readersBookeen Cybook Gen 3 eBook Reader
Main features: 5″ diagonal E Ink® electronic paper display – weight 260 grams – 512 MB storage (1,000 books) with optional SD card – supports multiple ebook formats – download with USB connection to PC via broadband – rechargeable battery – very light – mixed reviews 

UK=£180
US=$219

 


iRiver eBook reader
iRiver eBook Reader
Main features: 6″ diagonal E Ink® electronic paper display – eBook reader, Office Viewer, MP3 Player, Voice recorder, Personal organizer – weight 500 grams – 2.0 GB storage with optional SD card – supports multiple ebook formats – download with USB connection to PC via broadband – rechargeable battery – full QUERTY keyboard 

UK=£195

 


BeBook eBook reader
BeBook eBook Reader
Main features: 6″ diagonal E Ink® electronic paper display – weight 220 grams – 512MB storage (1,000 books) expandable to 4GB via SD slot – supports multiple ebook formats – download with USB connection to PC via broadband – rechargeable battery – preloaded with 150 free eBooks 

UK=£239

Red button eBooks on Writing and Study Skills


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Filed Under: Computers Tagged With: BeBook, Computers, Cybook, eBook readers, iRiver, Kindle, Media, Technology

ECDL: The Complete Coursebook

June 27, 2009 by Roy Johnson

coursebook for ECDL, or for improving computing skills

The European Computer Driving Licence (ECDL) is an internationally recognised certificate of computing skills. In a climate where employers are increasingly keen to employ staff with proven IT skills, the ECDL is highly regarded and provides proof of competence in the most common software applications. The licence is awarded to candidates who pass tests in seven modules, which together make up the ECDL syllabus.

  • Basic Concepts of IT
  • Using the Computer and Managing Files
  • Word Processing
  • Spreadsheets
  • Databases
  • Presentations
  • Information and Communication

This coursebook has been fully approved by the ECDL Foundation. If you can grasp these basic skills, you are well on your way to computer proficiency.

ECDL4: The Complete Coursebook It devotes a chapter to each of the modules and provides a comprehensive guide to some of the most common business applications. It’s written in clear, easy to follow language. It’s also jargon free and assumes little or no previous knowledge of the applications that it covers. Both the tests and the book are based on Microsoft software – and in particular Windows XP®, Internet Explorer 5® and Outlook Express 5®.

Although the ECDL modules are numbered, the tests can be taken in any order. However, the authors here assume readers will work through the sections in order. The earliest sections are aimed at the complete beginner and they explain basic computer terms and concepts. The later chapters provide less explanation of the basics.

Much of the material covered will be familiar to a regular computer user, but there are very clear explanations of, for example, the difference between ROM and RAM, and the meaning of bits and bytes. This is the only section of the coursebook that is entirely theoretical. Its aim is to prepare the reader for a multiple-choice test on the key concepts of Information Technology.

The rest of the book contains over 280 easy-to-follow exercises, which guide you through the various features of the relevant applications. Starting with the simplest of tasks, the exercises enable you to become familiar with the software before introducing its more advanced features. There are over 700 screen shots which show what the results should look like.

There are also plenty of hints and shortcuts, and it’s likely that even the most confident of computer users will pick up the odd little gem.

I used this book as preparation for my own ECDL tests. Since gaining the licence I’ve referred back to it many times to refresh my memory on various points and have found many of its hints and tips to be invaluable.

For anyone interested in taking the ECDL, this book contains everything you will need to pass. And it wouldn’t be wasted on those who simply want to improve their knowledge and skills in popular software applications.

More information about the ECDL is available from the official website at http://www.ecdl.com/

© Kathryn Abram 2003

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Paul Holden and Brendan Munnelly, ECDL4: The Complete Coursebook, Prentice Hall, new edition 2003, pp.640, ISBN 0130399175


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Facebook the missing manual

March 17, 2010 by Roy Johnson

complete guide to social networking

Facebook is flavour of the year in social networking terms right now. It didn’t start until 2004, and it already boasts a billion subscribers, with a user base which is claimed to be slightly more adult than that of My Space. But when you’ve posted all those snaps of yourself getting drunk at the parties – did you know that it’s quite difficult to take them down again just before that vital job interview? If you’re going to use Facebook and take it seriously, you need a guidance manual, and there hasn’t been one – until now. Facebook: the missing manual takes you through the whole process, step by step, from registering and creating your profile to joining networks and finding friends. And every one of those steps is spelled out in a commendably clear manner.

Facebook - The Missing ManualAuthor Emily Veer also reminds you at every stage that the attraction of being able to see the private details of other people’s lives means conversely that they can see yours. You should therefore think carefully about the information you make public.

Once you’ve made or located your friends, there’s a number of different ways of contacting them which are more subtle than a simple email message. You can ‘poke’ people (nudge them), ‘write on walls’ (make public statements inviting a response), and even send gifts. News feeds and blogs are built into the system, and you can participate in ‘groups’.

These groups can be based on a shared interest or hobby (physical astronomy or knitting) something you have in common (your old school), or even the locality where you live. Interestingly however, you are only allowed to join one group based on geographical location – so tough luck for second home owners.

Those are the main Facebook elements: next come the extensions to these basic functions. There’s a system of listing social (real world) events where you can arrange to meet friends. Then there’s a market place where you can place ads (which Facebook calls ‘listings’) so you can sell unwanted items (as on eBay) or buy from other people – all the while checking their credentials via what they post about themselves.

There’s also a system for job-finding and hiring people, or you can use Facebook’s bulletin boards and ‘notes’ feature to work on collaborative projects. And as on many other popular software systems, there are now free add-on applications (widgets and plug-ins) which can add functionality to the basic set-up.

The last section of the book returns, very responsibly, to the issue of privacy. Apart from showing you how to configure the advanced settings of your account, Veer recommends applying a simple rule: ‘Don’t put anything on view which you wouldn’t want your mother or your boss to know about you.” And remember that although at the time of writing Facebook is going through a re-design, it’s still very difficult to remove anything, once it’s up there.

Facebook   Buy the book at Amazon UK

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© Roy Johnson 2010


E.A. Vander Veer, Facebook: the missing manual, Sebastopol (CA): O’Reilly, 2nd edition 2010, pp.272, ISBN: 144938014X


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Guide to XML for Web Designers

July 5, 2009 by Roy Johnson

full explanation of XML coding and web design

XML is a set of codes which allow you, the user, to define the structure of your documents. These might be any tags – from <title> to <footnote>, from <quotation> to <caption>. People familiar with HTML will feel on home ground here. These tags mean that data can be displayed in whatever way you choose. For instance, once they have been tagged, a collection of books could be displayed in order of author, title, or publication date – with only one command – say, a click on a tab or a menu item.

Guide to XMLHowever, before you get too excited, XML has nothing to do with the manner in which the information is displayed on screen. For that, you need to add cascading style sheets. As Teresa Martin points out:

Insert some XML tags into your page and… they’ll just sit there. But, combined with style data, scripting data … you can create some powerful ways to present information

So – XML doesn’t make actions happen: it is used to define and describe a document. She provides quite a lot on the history of these standards – why and how they came into being, and who brought them about. There’s even a chapter on how the W3C deals with submissions and makes decisions about standards. This delays the hands-on instruction if read in page order, but I felt glad for the background.

In fact, en passant, there is a lot of interesting information on how and why XML has grown out of SGML, plus information on the Document Type Definition (DTD) and the Document Object Model (DOM). All this will be of interest to those people who want to know the difference between SGML, HTML, XML, and CSS, as well as those with a curiosity about information design and architecture. She also points to some of the latest developments which will be available soon – XPointer and XLink, which will allow a menu of potential destinations when you click on a hyperlink.

When the XML instructions eventually arrive, they are relatively simple and very similar to HTML. The one difference is that all tags have to be opened and closed without exception. She describes document structure, elements, and format via metaphors – which will be laboured for the technically-minded but reassuring for those like me who want their hands held as we walk into this complex world.

She includes the sensible suggestion that writing the document and adding the tags are kept as two separate processes. Trying to do both at the same time can easily result in a longer writing process, or missing some tags.

XML will be of most interest to people who are working with complex documents such as catalogues and instruction manuals which need to be consistent, or very big single documents such as reference manuals and dictionaries. It’s for creating the possibility of displaying the data in a number of different forms – alphabetically, by subject, author surname, date of publication, or even selected topic.

And if you feel you are going dizzy with all the acronyms and markup language, Teresa Martin has a valuable piece of advice. She suggests that you repeat as a mantra – ‘I can’t do it all’.

© Roy Johnson 2006

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Teresa A. Martin, Project Cool Guide to XML for Web Designers, London-New York: John Wiley, 2006, pp.298, ISBN 047134401X


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Hackers and Painters

June 20, 2009 by Roy Johnson

software design, open sources, and eCommerce

Paul Graham co-wrote the software for Viaweb, which was bought out by Yahoo for their successful build-it-yourself online stores kit. Hackers and Painters is his reflections on software design, eBusiness, open software, and capitalism today. You might be surprised by the resulting mix. It’s written in an engaging, grab-you-by-the-lapels style, and because he’s studied it, a lot of the argument is conducted via the metaphor of painting. Overall this works, because he is putting the case for craftsmanship, discipline, and originality. He makes an interesting defence of a hacker’s right to disregard copyright – on the grounds that we need to keep their anti-authoritarian attitudes alive to preserve civil liberties, defending a free, strong society.

Hackers and PaintersHis next subject is Web-based software. This is where you don’t buy and install software on your own computer. Instead, it sits on a central server, and you interact with it via a web browser – which might be a mobile phone, a PDA, or a telephone. If necessary of course, you could also use a computer. The central item in what’s billed as ‘Big ideas from the computer age’ is upbeat and inspiring advice for would-be start-ups:

There are only two things you need to know about business: build something users love, and make more than you spend. If you get these two right, you’ll be ahead of most startups. You can figure out the rest as you go.

It’s a combination of technological theory, eBusiness strategy, and tips for would-be software developers. But because he’s anti-authoritarian, a supporter of open source software, and all in favour of free enterprise, don’t imagine he’s a traditional radical. One of his essays is an argument in favour not only of individual wealth, but encouraging differences in wealth.

There are two interesting essays on the evolution of programming languages. Non-technical readers don’t need to worry, because they are written in a lively, jargon-free style that’s easy to understand.

Despite my reservations on his economic policies, he shot up in my estimation when he put his cards on the table regarding the academic world:

In any academic field, there are topics that are ok to work on and others that aren’t. Unfortunately the distinction between acceptable and forbidden topics is usually based on how intellectual the work sounds when described in research papers, rather than how important it is for getting good results. The extreme case is probably literature; people studying literature rarely say anything that would be of the slightest use to those producing it.

There is a whole policy review, a major reinvestigation of ‘lit crit’, and a great deal of intellectual soul-searching to be done on the strength of that one observation alone.

At the heart of the book, there’s also an argument in favour of the Lisp programming language. It’s what he used to write his successful venture at Viaweb.

This is a lively and thought-provoking collection of studies which comes from somebody who has both done the programming first hand, and thought a lot about the social consequences of it.

© Roy Johnson 2010

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Paul Graham, Hackers and Painters: Big Ideas from the Computer Age, Sebastopol (CA): O’Reilly, 2010, pp.272, ISBN: 1449389554


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Home and Small Office Networking

July 10, 2009 by Roy Johnson

practical guide to building a home network on a budget

Many homes these days have a second or a spare computer; and more people than ever are either working from home or starting their own small businesses. For all of them, setting up a computer network can be the foundation for more efficient working. With links between your equipment, you can keep in touch with people in another room or out on the road. You can share information, keep everything updated from one desk, and share resources. But how would you go about doing it? Well, John Paul Mueller provides the advice and the tools you will need in Home and Small Office Networking his plain-speaking guide to setting up a computer network for small businesses on a budget. His approach is extremely thorough.

Home and Small Office NetworkingHe starts by helping you to define what you might need, how to set up a small office network, and the range of cheap options available. Did you know that it’s even possible to use the electrical wiring in your own home as the basis for the network? There’s plenty here on cabling, connections, and tips on the best equipment to choose. It might be a technically challenging task – but he takes you through step by step, passing on a lot of first-hand experience on the way.

He also spends quite some time on the software you will need for efficient administration of the system, as well as network security and maintenance. But the part which I suspect will appeal most to a lot of get-up-and-go entrepreneurs are the chapters on remote communications and connections via the Internet. These will allow you to share information and keep in touch with both mobile and home workers.

And he doesn’t neglect either the costs or the cost-effectiveness of building such a system. His goal is to help small businesses get the most from networking, and he both looks at the benefits and explains in easy-to-understand language how to design, protect, and maintain your network.

The main point of these books from the very successful Poor Richard series is that they provide the enthusiast, the amateur, and the small business with lots of budget-priced tools for development. They explain what to do in a jargon-free, no-nonsense manner, and they offer lists of free and bargain-level resources. Whether you’re in the next room or on the road, this book tells you how to set up an inexpensive network.

© Roy Johnson 2001

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John Paul Mueller, Poor Richard’s Home and Small Office Networking, Lakewood CO: Top Floor, 2001, pp.357, ISBN 1930082037


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How to deal with .exe files

September 14, 2009 by Roy Johnson

procedures for dealing with executable files (programs)

.exe files

.exe files These notes will help you to understand .exe files.

.exe files They tell you how to dowload them and save them.

.exe files You can print out these notes for reference.

.exe files Soon, you won’t need them any more!


1. These .exe files are information which has been compressed to take up less space.

2. They can also be downloaded and extracted without the unzipping process.

3. The really good news is – they unzip themselves!

4. You download them in the same way as any other file.

5. See downloading instructions for details.

6. Go to the Internet site and download your .exe file.

7. A dialogue box will ask you if you wish to save the .exe file into a directory.

7. Don’t worry about this process. You can remove or delete anything later if you change your mind.

8. For instance, you might be asked to download file filename.exe into the suggested directory [or folder]:

C:FOLDERfilename.exe

9. If a dialogue box pops up and asks – ‘Create directory C:FOLDER ?’ – you should say ‘Yes’.

10. This puts the file filename.exe which you want to download into a directory called FOLDER.

11. This directory is created automatically on your hard disk.

12. You can give it another name if you wish:

C:MYSTUFFfilename.exe

13. Remember – you can delete it all later if you wish.

14. Now you can log off the Internet if you are on a dialup connection.

15. Go to your Windows file manager. This is ‘Windows Explorer’ in Win95 and later. [Not to be confused with Internet Explorer.]

16. Locate the directory FOLDER which has been created.

17. The file filename.exe will be in the directory.

18. Double-click on the file. This activates it.

19. Another dialogue box comes up, asking where you wish to place the file.

20. You could type C:MYSTUFF or C:TEMP

22. Choose your directory, say OK, and the file will be unzipped into the place you choose.

23. Voila! It all happens automatically – and very quickly.

24. You can now open the file which has extracted itself.

25. Do this by double-clicking on it.

25. These files will be automatically opened by the following programs:

.txt files – Windows Notepad

.doc files – Microsoft Word

.htm files – Firefox or Internet Explorer

© Roy Johnson 2004


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