1. hardware
1.1. Input
1.1.1. keyboards, mice
1.2. system units
1.2.1. The microprocessor
1.2.2. Memory
1.2.2.1. RAM
1.3. Secondary storage
1.3.1. hard disks
1.3.2. solid-state storage
1.3.3. optical discs
1.3.3.1. compact discs (CD)
1.3.3.2. Digital versatile discs (DVD)
1.3.3.3. Blu-ray discs
1.4. Communication
1.4.1. modem (modifies data)
1.5. Output
1.5.1. The display (monitor)
2. data
2.1. texts
2.2. numbers
2.3. sounds
2.4. images
3. people
4. software
4.1. system software
4.1.1. operating system(run apps,interface,coordinate resources)
4.1.1.1. RTOS
4.1.1.1.1. mobile devices
4.1.1.2. NOS
4.1.1.2.1. networks
4.1.1.3. Stand-alone
4.1.1.3.1. Windows10/macOS
4.1.2. utilities(manage resources)
4.1.2.1. programs that make computing easier
4.1.2.2. antivirus
4.1.2.3. security suits
4.1.2.3.1. McAfee
4.1.2.3.2. Symantec's Norton
4.1.2.4. file transfer
4.1.2.4.1. BitTorrent
4.1.2.4.2. FTP
4.1.2.4.3. web-based
4.1.2.5. filters
4.1.3. Device drivers
4.1.4. Language Translator
4.2. application software
4.2.1. word processors
4.2.2. spreadsheets
4.2.3. database management systems
4.2.4. presentation softwares