Active use of PDA

I make active use of a PDA (personal digital assistant).

It provides the following functions:

* mobilephone
* contacts
* calendar
* notes

I have some programs in the PDA, including:

* bus guide
* digital street directory
* logic9 puzzles

My PDA can be synchronised with my personal computer. If I lose my PDA, the data is still available.

The digital street directory is very useful. I can enter a street name or postal code, and the map is displayed immediately. This directory is developed on my specification and will be made available to distributors of new PDAs.