Across
1
Main processor of a computer
3
Rules for data communication
5
Pointer on a computer screen
6
Encode data to keep it secure
7
Input device with letter and number keys
8
Information processed by a computer
9
Computer model of a real-world system
Down
2
Reusable block of code
3
Set of instructions for a computer
4
Connected group of computers
5
Online data storage and computing