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Computer Terms
| Term | Definition |
|---|---|
| Central processing unit (CPU) | The chip located inside the system unit of a computer that performs the processing for a computer |
| Gigahertz (GHz) | Speed of a processor counted by *billions* of ticks per second |
| Megahertz (MHz) | Speed of a processor counted by *millions* of ticks per second |
| System unit | The container that holds the motherboard and keeps components safe |
| Motherboard | The main circuit board of a computer to which all computer system components connect |
| Basic input/output system (BIOS) | Lowest level software in the computer that acts as an interface between the hardware and the operating system |
| Read only memory (ROM) | Contain permanently written data called firmware that loads the operating system when first powered on |
| Cache | Small, high-speed memory between the processor and system memory. Faster than RAM |
| Hard disk drive (HDD) | A storage system consisting of one or more metal magnetic disks permanently sealed with an access mechanism inside its drive |
| Megabyte (MB) | Storage measurement in millions of bytes |
| Gigabyte (GB) | Storage measurement in billions of bytes |
| Terabyte (TB) | Storage measurement in trillions of bytes |
| Random access memory (RAM) | Provides a high-speed, temporary location for the computer to hold data and program instructions |
| Bit | The smallest unit of computing, consists of a 0 or 1 (ON or OFF) |
| Byte | 8 bits makes 1 |
| Video graphic adapter | Enables the connection of a monitor and may provide additional graphics capabilities |
| Network interface card | Enables a PC to connect to a network |
| Optical drive | Adds read and write capabilities to your computer for portability |
| Monitor | A display device that projects images onto a display screen |