1. networks and the internet
1.1. network
1.1.1. collection of computers and devices connected
1.1.2. wireless
1.1.3. via communications devices
1.1.4. transmission media
1.2. internet
1.2.1. worldwide collection of networks
2. Types of computer
2.1. supercomputers
2.1.1. fastest
2.1.2. most powerful computer
2.2. mainframe computers
2.2.1. large
2.2.2. expensive
2.2.3. powerful computer
2.3. midrange computers
2.3.1. less powerful than a mainframe computer
2.3.2. more powerful than a personal computer
2.4. personal computers
2.4.1. can perform all of its input
2.4.2. processing
2.4.3. output
2.4.4. storage activities by itself
3. How to computer work?
3.1. input data
3.2. processing data
3.3. output data
4. What is computer?
4.1. A computer is an electronic device, operating under the control of instructions stored in its own memory
5. History of Computers
5.1. technology
5.1.1. 0th generation
5.1.1.1. mechanical era
5.1.2. first generation
5.1.2.1. vacuum tube
5.1.3. second generation
5.1.3.1. transistor
5.1.4. third generation
5.1.4.1. integrated circuit based
5.1.5. forth generation
5.1.5.1. VSCI microprocessor based
5.1.6. fifth generation
5.1.6.1. ULSI technology
6. Components of a computers
6.1. hardware
6.1.1. output device
6.1.1.1. screen
6.1.1.2. speakers
6.1.2. input device
6.1.2.1. mouse
6.1.2.2. keyboard
6.1.3. system unit
6.1.3.1. CPU
6.1.3.2. RAM
6.1.4. storage device
6.1.4.1. hard drive
6.1.4.2. pendrive
6.1.5. communication device
6.1.5.1. computer
6.1.5.2. smartphone
6.2. software
6.2.1. system
6.2.1.1. operating system
6.2.1.2. utility program
6.2.2. application
6.2.2.1. general-purposed
6.2.2.2. specialized
6.2.2.3. apps
7. Von Neumann Architecture
7.1. ALU : arithmetic logic unit
7.1.1. perform arithmetic and Boolean logical calculations
7.2. CU : control unit
7.2.1. controls processing of instructions
7.2.2. controls movement of data within the CPU
7.3. Interface unit
7.3.1. moves instructions and data between the CPU and other hardware components
7.3.2. Bus : bundle of wires that carry signals and power between different components