2. CPU
Controls the operation of the computer
It interprets and carries out the basic
instructions that operate a computer
On personal computer, all function of the
processor usually are on a single chip
Term microprocessor – refer to a personal
computer processor chip.
3. EXPANSION SLOT
The socket where the circuit board or the
adapter cards can be inserted into the
motherboard
Engineered technique for adding capabilities
to a computer
PCI & ISA
4. EXPANSION CARD
Plugged into an expansion
slot
Used to added new
devices or capabilities to a
computer
Card may come in one of
sizes designed to match
standard slot dimensions
5. RAM SLOT
The slot where the computer memory
(RAM) is placed on the computer’s
motherboard
6. PORTS & CONNECTORS
A port is the point which a peripheral
attaches to a system unit so that the peripheral
can send data to or receive information from the
computer
Ports have different type of connectors. A
connector join the cable attaches to a peripheral
One end of cable attaches to the connector on
the system unit and the other end of the cable
attaches to a connector on the peripheral
9. 1. Serial Port
Used to connect a modem, data
acquisition terminal or other serial devices
via slow-speed serial interface
transmitting data a bit a time
11. 2. Parallel Port
Socket on computer used to connect a printer or
other parallel devices
Transferring information more than one bit a time
Developed as an alternative to the slower speed
serial port
Can transfer 8 bits of data (1 byte) simultaneously
through 8 separate lines in a single cable
13. 3. USB Port
Can connect up to 127 different
peripherals together with a single
connector
Transfers data to a speed of 12
megabits per second
Replacing the serial and peripheral ports
on a PC, at least 4 USB ports are
standard on every computer
15. 4. FireWire port
Similar to USB port : can connect multiple
types of device that require faster data
transmission speeds
Cam-coders & other video equipment use this
port to transmit data
Transmit data 400 Megabits per second
Up to 63 devices can be daisy-chained to one
Fire-Wire port
16. Special purpose ports
1.
2.
3.
4.
MIDI port : design to connect the system
unit to a musical instrument such as
electronic keyboard
SCSI port : special high-speed parallel-port
used to attach peripheral devices such as
disk drives and printer
IrDA port : transmit data via infrared light
waves. Both computer must have a IrDA
port
BlueTooth port : use radio wave to transmit
data between two devices
