enables the programmer to draw a flow chart
provides a layer, user friendly interface
links a program with subroutine it references
all of these
Batch and interactive
Sequential and real time
Batch and time share
Sequential and direct
Interrupt servicing
Interrupt handling
Polling
Spooling
Time sharing
Multi-tasking
Operating environment
Spreadsheet
1
2
3
4
Software routines
Input-output devices
Hardware components
All of these
Fair-share scheduling
Deadline scheduling
Non-preemptive scheduling
Preemptive scheduling
Input/output control program
Job control program
Supervisor
Performance monitor
UNIX
MS-DOS
CP/M
PASCAL
Multiprogramming
Batch operating system
None of these
