The tangible, physical computer equipment that can be seen and touched.
Intangible set of instructions that tells the computer what to do.
Basic Functions of PC
In binary (computer language), a bit represents a zero or one.
a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information
a unit of information equal to one thousand (1024) bytes
a unit of information equal to one million (1,048,576) bytes
a unit of information equal to one billion (1,073,741,824) bytes or 1024 megabytes
a unit of information equal to a trillion (1,099,511,627,776) bytes or 1024 gigabytes
These digits operate on a base-16 number system rather than the base-10 number system most people use. These numbers use the letters A, B, C, D, E, and F along with the numbers 0 to 9 to create their 16 different digits.
Abbreviation of central processing unit. The CPU is the brains of the computer. Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place.
A device such as a monitor, printer, or keyboard that connects to the system unit through ports.
A narrow slot on the motherboard where an expansion card can be inserted. Expansion slots connect to a bus on the motherboard.
The main circuit board of a microcomputer. The motherboard contains the connectors for attaching additional boards.
technology used by some RAM chips, flash memory chips, and other types of memory chips that provide high speeds and consumes little power by using battery power while the computer is off.
basic input/output system
the most common computer memory which can be used by programs to perform necessary tasks while the computer is on
The software stored on these chips can be overwritten by new software that remains on the chip until it is overwritten.
the computer's main memory, which consists of the random access memory (RAM), cache memory, and the read-only memory (ROM) that is directly accessible to the CPU
Stores programs and other files for access by the computer. Does not loose memory when the power goes
solid state drive, a storage device that typically uses flash memory to store data, instructions, and info
parallel advanced technology attachment
Serial ATA (Serial Advanced Technology Attachment) is a new standard for connecting hard drives into computer systems
A wire on a circuit board that connects two
components or devices.
an electrical conductor that makes a common connection between several circuits
(computer science) rules determining the format and transmission of data
a bi-directional line that carries data to and from the processor, main memory and devices
Front Side Bus - connects the CPU to the RAM - the higher the speed, the better
The pace at which the computer processes information is regulated by the system clock. Modern system clocks tick at a rate of 1-4 gigahertz (billions of ticks each second).
One million cycles per second, a measure of the clock chip in a computer, which establishes how fast a processor can operate.
one billion ticks of the system clock per second
(computer science) coded instructions that are stored permanently in read-only memory
Three Parts of the BIOS
1)POST- Power On Self Test; diagnostic program that is run each time the computer starts.
2)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.
3)System BIOS- BIOS located on the motherboard. Manages simple devices and starts computer.
Plug and Play
technology that allows a hardware component to be attached to a computer so that it is automatically configured by the operating system, without user intervention