Description: Facdatum Limited is an independent app developer for iPhone and Android.
with an Apple Macintosh you can't run Radio Shack programs in its disc drive. nor can a Commodore 64 drive read a file you have created on an IBM Personal Computer.
both Kaypro and Osborne computers use the CP/M operating system but can't read each other's handwriting for they format (write on) discs in different ways.
the Tandy 2000 runs MS-DOS but can't use most programs produced for the IBM Personal Computer unless certain bits and bytes are altered