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1. choose MS-Word (or another HFA) as an example:

I have chosen Word.

1.1. how much (in percent) of the functionality of the HFA do you know?

I would guess that I know between 20%-30% of the functionality of Word.

1.2. how do you learn new functionality?

I learn the functionality on demand.

1.3. for MS-Word users: is there a command in MS-Word which "transposes two characters" (e.g., "leanr" becomes "learn" by positioning the cursor between n and r and executing the command)?

I could not find a command that transposes letters, but there is an option that will automatically fix transpose errors for commonly mispelled words. For example, it will automatically change hte to the.

2. what have YOU learnt "on demand" in YOUR life? Briefly describe the most prominent examples.

I think that I do most of learning on demand. Most things I learn in programming are by demand. I do not know the libraries or the classes to use so I go look them up.

3. what do people have to know to be able to learn on demand?

Anyone who is to learn on demand needs to know what they want to learn and then where they can find the information that the need that will allow them to learn.

4. why should one "learn on demand" instead of relying on "use on demand"?

A person who uses on demand just figures out enough for them to do what they want, but do not do enough to remember it when they want to use it again. Learning on demand the person would actually learn the information so they would not have to look it up again the next time that they want to use it.

5. which computer systems have you encountered which

5.1. have a User Modeling Component?

MS-Word has user modeling. It automatically will correct commonly misspellings of words.

5.2. supported learning on demand?

Windows OS and most of the applications for it.

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