Across
1
Smallest unit of digital data
3
Computer model of a real-world system
4
Point where user interacts with system
5
Main processor of a computer
9
Input device with letter and number keys
Down
1
Data type with true or false values
2
Reusable block of code
6
Encode data to keep it secure
7
Organized collection of stored data
8
Series of commands for a computer