
Computer software
Concurrent DOS. At the time of writing, this offers the following
features:
Φ multi-tasking with up to four windows visible at any time on the
screen, each running a different program
• multi-user facilities for up to three users, using PCs or
workstations linked to an IBM-AT or compatible
• compatibility with DOS, so that programs written for that
operating system will run without difficulty.
A more powerful operating system, which runs on larger
computers and also high-end PCs is Unix. This is designed with
multi-tasking and multi-user applications in mind, and is steadily
increasing in popularity as microcomputers becom ...