横向
1
Portable personal computer
3
Ordered collection of data elements
4
Computer model of a real-world system
5
Information processed by a computer
6
Program to access the internet
纵向
2
Point where user interacts with system
7
Main processor of a computer
8
Global computer network
9
Encode data to keep it secure
10
Security system blocking unauthorized access
11
Computer that provides services to others
12
Temporary computer memory