横向
1
Storage location for code
7
Function that calls itself
8
Point where user interacts with system
9
Information processed by a computer
10
Global computer network
纵向
2
Interface for software to communicate
3
Security system blocking unauthorized access
4
Computer model of a real-world system
5
Smallest unit of digital data
6
Conversion of data into secret code
11
Storage medium for digital data
12
Rules for data communication