Time Sharing Systems
(TSS)
ä Batch multiprogramming does not support
interaction with users
ä TSS extends multiprogramming to handle multiple
interactive jobs
ä Processor’s time is shared among multiple users
ä Multiple users simultaneously access the system
through terminals
ä Because of slow human reaction time, a typical user
needs 2 sec of processing time per minute
ä Then (about) 30 users should be able to share the
same system without noticeable delay in the
computer reaction time
ä The file system must be protected (multiple
users…)