横向
1
Computer model of a real-world system
4
Collection of web pages
7
Point where user interacts with system
9
Data type with true or false values
11
Information processed by a computer
纵向
2
Interface for software to communicate
3
Unit of digital information equal to 8 bits
5
Named storage location in code
6
Instructions written for a computer
8
Pointer on a computer screen
10
Connected group of computers
12
Ordered collection of data elements
13
Security system blocking unauthorized access