In 1946 the first computer, the birth of the United States
1. perforated cassette manual ---
--- human conflicts, input and output is too slow, CPU (tubes) underutilization
2. Batch
Batch Online
Batch offline
--- input and output is too slow, CPU underutilization
3. multi-channel multi-batch system ----
---- man-machine interaction can not
---- CPU underutilization
4. The time-sharing system
--- advantages: Human-Computer Interaction
---
5. Real-Time Systems
Personal computer
Network computer
Distributed computer
6. The process is the smallest unit of computer resource allocation