Computer parts	Picture / Function	Different sizes/ types/ options
Mortherboard:A motherboard sometimes alternatively known as the mainboard, system board, baseboard, planar board or logic board		XT, AT, Baby AT and ATX
CPU: electronic circuitry within a computer that carries out the instructions of a computer program		Single core, quad, and  dual CPU
Hard drive:a high-capacity, self-contained storage device containing a read-write mechanism plus one or more hard disks, inside a sealed unit		ATA/IDE and SATA for consumer-level drives, and SCSI, Serial Attached SCSI (SAS), and Fibre Channel
Network card:electronic device that connects a computer to a computer networ		Ethernet (wired) and WiFi(wireless)
Ram :place in a computing device where the operating system (OS), application programs and data in current use are kept		SDRAM, DDR and Rambus DRAM. Almost all systems used to ship with 3.3 volt, 168-pin SDRAM DIMMs
Power supply unit: converts mains AC to low-voltage regulated DC power for the internal components of acomputer		SFX form factor PSU. A TFX form factor PSU. A Flex-ATX form factor PSU. A formerly used AT PSU, mechanically of the same size as the ATX PSUs. PS3 power supply, shorter than ATX, only, 300 W max (not to be confused with the PlayStation 3)
Video card: connects to the motherboard of acomputer system and generates output images to display		Accelerated Graphics Port (AGP) or aPeripheral Component Interconnect Express (PCIe) connection
Optical drive: type of computer disk drive that reads and writes data from optical disks through laser beaming technology		CDs, DVDs, and Blu-ray discs
Opporating system : software that supports a computer's basic functions, such as scheduling tasks, executing applications, and controlling peripherals		Microsoft Windows, Mac OS, and Linux

Key board: a panel of keys that operate a computer		QWERTY, AZERTY, QWERTZ and HCESAR
monitor:display screen used to provide visual output from a computer		CRT (Cathode Ray Tube),LCD (Liquid Crystal Display),LED (Light-Emitting Diodes)
speakers:device that converts analog audio signals into the equivalent air vibrations in order to make audible sound		2.1 Speaker. The 2.1 speaker setup involves 2 satellite speakers and 1 subwoofer. ... 5.1 Speaker. 5.1 speaker setups consist of 5 satellite speakers and 1 subwoofer. ... 7.1 Speaker. ...
heat sink :electronic device that incorporates either a fan or a peltier device to keep a hot component such as a processor cool		fan or a peltier device
sound card:  expansion card or IC for producingsound on a computer that can be heard through speakers or headphones		PCI Sound Card, USB Interface, Firewire Interface, PCMCIA / PC Cardbu
Bluetooth card: short-range radio technology		often used in computers to communicate with wireless keyboards, mice, and printers
expansion slots: a place in a computer where an expansion card can be inserted		Interface card (ATA, Bluetooth, EIDE, Firewire, IDE, Parallel, RAID, SCSI, Serial, and USB) Modem. MPEG Decoder. Network Card. Sound Card. Video capture card. Video Card.