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CIT165 HW Ch 1
CIT165 HW Comp Chapter 1 Intro Hardware
Question | Answer |
---|---|
adapter card | A card used by the CPU to communicate with devices inside and outside the case. |
binary number system | The number system used by computers; it has only two numbers, 0 and 1, called binary digits, or bits. |
BIOS (basic input/output system) | Firmware that can control much of a computer’s input/output functions, such as communication with the floppy drive and the monitor. Also called ROM BIOS. |
BIOS setup bit | Used to change some settings on the motherboard. |
bit(binary digit) | A 0 or 1 used by the binary number system. |
bus | The paths, or lines, on the motherboard on which data, instructions, and electrical power move from component to component. |
byte | A collection of eight bits that can represent a single character. |
cards | Adapter boards or interface cards placed into expansion slots to expand the functions of a computer, allowing it to communicate with external devices such as monitors or speakers. |
central processing unit (CPU) | Also called a microprocessor or processor. The heart and brain of the computer, which receives data input, processes information, and executes instructions. |
chipset | A group of chips on the motherboard that controls the timing and flow of data and instructions to and from the CPU. |
clock speed | The speed, or frequency, expressed in MHz, that controls activity on the motherboard and is generated by a crystal or oscillator located somewhere on the motherboard. |
CMOS (complementary metaloxide semiconductor) | The technology used to manufacture microchips. CMOS chips require less electricity; hold data longer after the electricity is turned off, are slower, and produce less heat than earlier technologies. The configuration, or setup, chip is a CMOS chip. |
CMOS RAM | region of memory that uses battery power to retain data after the PC is shut off. |
CMOS setup | A chip on the motherboard that contains a very small amount of memory, or RAM enough to hold configuration, or setup, information about the computer The chip is powered by a battery when the PC is turned off. |
data bus | The lines on the system bus that the CPU uses to send and receive data. |
data path size | The number of lines on a bus that can hold data, for example, 8, 16, 32, and 64 lines, which can accommodate 8, 16, 32, and 64 bits at a time. |
DIMM (dual inline memory module) | A miniature circuit board installed on a motherboard to hold memory. DIMMs can hold up to 2 GB of RAM on a single module. |
expansion cards | A circuit board inserted into a slot on the motherboard to enhance the capability of the computer. |
expansion slots | A narrow slot on the motherboard where an expansion card can be inserted. Expansion slots connect to a bus on the motherboard. |
firmware | Software that is permanently stored in a chip. The BIOS on a motherboard is an example of firmware. |
flash ROM | ROM that can be reprogrammed or changed without replacing chips. |
floppy disk drive (FDD) | See Floppy drive. |
floppy drive | An older secondary storage device sometimes found inside the case. |
front side bus (FSB) | Another term for the system bus. |
gigahertz (GHz) | One thousand MHz, or one billion cycles per second. |
graphics card | See video card. |
hard copy | Output from a printer to paper. |
hard drive | The main secondary storage device of a PC, a small case that contains magnetic coated platters that rotate at high speed. |
hardware | The physical components that constitute the computer system, such as the monitor, the keyboard, the motherboard, and the printer. |
hertz (Hz) | Unit of measurement for frequency, calculated in terms of vibrations, or cycles per second. For example, for 16-bit stereo sound, a frequency of 44,000 Hz is used. |
host bus | another term for the system bus. |
keyboard | A common input device through which data and instructions may be typed into computer memory. |
main board | another term for motherboard. |
megahertz (MHz) | One million Hz, or one million cycles per second. |
memory | Physical microchips that can hold data and programming, located on the motherboard or expansion cards. |
microprocessor | another term for the CPU. |
monitor | The most commonly used output device for displaying text and graphics on a computer. |
motherboard | The main board in the computer, also called the system board. The CPU, ROM chips, SIMMs, DIMMs, RIMMs, and interface cards are plugged into the motherboard. |
mouse | A pointing and input device that allows the user to move a cursor around a screen and select items with the click of a button. |
non-volatile | memory |
Parallel ATA (PATA) | The older and slower ATA standard. |
parallel port | female 25-pin port on a computer that can transmit data in parallel, 8 bits at a time, and is usually used with a printer. The names for parallel ports are LPT1 and LPT2. |
peripheral device | Devices that communicate with the CPU but are not located directly on the motherboard, such as the monitor, floppy drive, printer, and mouse. |
port | (1) As applied to services running on a computer, a number assigned to a process on a computer so that the process can be found by TCP/IP. (2) Another name for an I/O address.(3) A physical connector, usually at the back of a computer. |
power supply | A box inside the computer case that supplies power to the motherboard and other installed devices. Power supplies provide 3.3, 5, and 12 volts DC. |
primary storage | Temporary storage on the motherboard used by the CPU to process data and instructions. Memory is considered primary storage. |
printer | A peripheral output device that produces printed output to paper. Different types include dot matrix, ink-jet, and laser printers. |
processor | another term for the CPU. |
program | A set of step-by-step instructions to a computer. Some are burned directly into chips, while others are stored as program files. Programs are written in languages such as BASIC and C++. |
protocol | A set of rules and standards that two entities use for communication. |
RAM (random access memory) | Memory modules on the motherboard containing microchips used to temporarily hold data and programs while the CPU processes both. Information in RAM is lost when the PC is turned off. |
ROM (read-only memory) | Chips that contain programming code and cannot be erased. |
S/PDIF (Sony-Philips Digital Interface) sound port | connects S/PDIF sound card to the motherboard. |
secondary storage | Storage that is remote to the CPU and permanently holds data, even when the PC is turned off, such as a hard drive. |
serial ATA (SATA) | The newer and faster ATA technology. |
serial port | A male 9-pin or 25-pin port on a computer system used by slower I/O devices such as a mouse or modem. Data travels serially, one bit at a time, through the port. Serial ports are sometimes configured as COM1, COM2, COM3, or COM4. |
software | Computer programs, or instructions to perform a specific task. Software may be BIOS, OSs, or applications software such as a word-processing or spreadsheet program. |
startup BIOS | Part of system BIOS that is responsible for controlling the PC when it is first turned on. Startup BIOS gives control over to the OS once it is loaded. |
system BIOS | BIOS located on the motherboard. |
system board | Another term for the motherboard. |
system bus | The bus between the CPU and memory on the motherboard. The bus frequency in documentation is called the system speed, such as 400 MHz. Also called the memory bus, front-side bus, local bus, or host bus. |
system clock | A line on a bus that is dedicated to timing the activities of components connected to it. The system clock provides a continuous pulse that other devices use to time themselves. |
trace | A wire on a circuit board that connects two components or devices. |
USB (universal serial bus) port | A type of port designed to make installation and configuration of I/O devices easy, providing room for as many as 127 devices daisy-chained together. |
video card | An interface card installed in the computer to control visual output on a monitor. Also called display adapter. |
video memory | Memory chips embedded on a video card. |
volatile | Refers to a kind of RAM that is temporary, cannot hold data very long, and must be frequently refreshed. |