1. Hardware
1.1. Input and Output Units
1.1.1. Entry
1.1.1.1. Keyboard
1.1.1.2. Screen
1.1.1.3. Cod. Bar Reader
1.1.1.4. Scanner
1.1.2. Departure
1.1.2.1. Screen
1.1.2.2. Printer
1.2. Central Processing Unit (C.P.U)
1.3. Memory
1.3.1. Principal
1.3.1.1. ROM (Read Only Memory)
1.3.1.2. RAM (Random Access Memory)
1.3.2. Secondary
1.3.2.1. Floppy
1.3.2.2. Hard Drives
1.3.2.3. DVD
1.3.3. BIT: Binary digit. It is the smallest unit of information to store, it can have two values: a zero or a one. BYTE: Corresponds to 8 bits and in general, it is equivalent to a character (letter, number or sign). KILOBYTE (KB): Represents 1024 bytes. Many times it approaches 1000. MEGABYTES (MB): Represents 1000 Kb or 1048576 bytes. Gigabyte (GB): Represents 1000 Mb. TERABYTE (TB): Represents 1000 Gb.
2. Software
2.1. System Software or Operating System
2.1.1. Operating systems for PC: MS-DOS, OS-2, Windows.
2.2. Utilitarian or Applications
2.2.1. Google Chrome
2.2.2. Oficce
2.2.3. PDF