4. Types of Operating system
4.1 Batch Operating System
4.2 Multi-Tasking/Time-sharing Operating systems
4.3 Real time OS
4.4 Distributed Operating System
4.5 Network Operating System
4.6 Mobile OS
5. Programming languages
5.1 Generations of Programming Languages
5.2 The first and second generations
5.3 The third generation
5.4 The fourth generation
6. Compilers and Interpreters
6.1 Compilers
6.2 Interpreters
6.3 Loader
6.4 Scheduler