äBatch multiprogramming does not support interaction with users
äTSS extends
multiprogramming to handle multiple interactive
jobs
äProcessor’s time is
shared among multiple users
äMultiple users
simultaneously access the system through
terminals
äBecause of slow human reaction time, a typical user needs 2 sec of processing time per minute
äThen (about) 30
users should be able to share the same system
without noticeable delay in the computer
reaction time
äThe file system must be protected (multiple users…)
ä