1.   A public-key user needs to obtain and validate a certificate containing the required public key.

2.   Address controller has all the options the Novice user would need to store, recall and list addresses.

3.   Computer users need to be trained and equipped to use mice correctly.

4.   Drug users need to know that sharing needles is high-risk behaviour.

5.   Users would not need to buy packaged software, nor would they have to learn programs and operating systems.

6.   First, users need to be careful about attached files sent to them, especially, but not only, if the source of the file is in doubt.

7.   A list of phonetic symbols for vowels and consonants is given in the Introduction and can be called up whenever the user needs to refer to it.

8.   The user also needs to know the operations that can be applied to the relations so as to carry out the desired retrievals.

9.   Most LIFESPAN users need little knowledge of the offline system.

10.   The first part provides the basic information which every LIFESPAN user needs to know when accessing the system.