Explanation

• The CPU (Central Processing Unit) is the brain/heart of the computer.
• It performs all calculations, executes instructions, and controls other components.

Additional information:

• First commercial CPU: Intel 4004 (1971)
• Invented by: Italian physicist Federico Faggin
• CPU Examples: Clock speeds – 3.0 GHz, 3.5 GHz, 4.0 GHz, 4.5 GHz, 5.0 GHz

Last verified on 15-02-2026

Explanation

• Ctrl + A: Select All

Additional information:

• Ctrl + C: Copy
• Ctrl + V: Paste
• Ctrl + X: Cut
• Ctrl + Z: Undo

Last verified on 02-07-2026

Explanation

• Google is the largest search engine on the internet.
• It holding more than 80% of the global search market share.
• Google is a US multinational technology company that provides internet search services.
• It started as a search engine in 1997.
• It was officially founded on September 4, 1998.
• Its parent organization is Alphabet Inc.

Last verified on 02-07-2026

Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026

Explanation

• IBM (International Business Machines) was founded in June 16, 1881. 
• Original Name: Tabulating Machine Company
• Renamed as IBM: 1924

Last verified on 02-07-2026