CACTUS: Calculator and Computer Technology User Service‪.‬

We can connect a PDA to a computer by USB, infrared beam or radio and find that appropriate software on each machine has updated our calendars, address books and task lists and stands ready to transfer music and movies from a file format suitable to our computer to the quite different file format required by our PDA. With equal ease we can translate and move Word and Excel files. The transfer of data from one part of a computer to another has always been a complex task in which speed is traded against accuracy and the time required for error correction. Much more complex therefore is the transfer of information from one machine to another of a different type.