ICT2
by leandro and jero
1. Single-User Single-Application
1.1. Only one user can do all the work
1.2. Only one application at a time
1.3. like a cellphone
2. Single-User Multi-tasking
2.1. Only one user can work with it at the time
2.2. It can handel more than one application at a time
2.3. Like a PC
3. Multi-User Multi-Tasking
3.1. More than one can work at a time
3.2. It can handel more than one application at a time
3.3. Like a powerfull PC
4. OS
4.1. With out it the PC does no work
4.1.1. Links Hardware and Software