CPU (Central Processing Unit)

About CPU (Central Processing Unit)

About CPU (Central Processing Unit)

A central processing unit (CPU), also called a central processor or main processor, is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions.

The form, design, and implementation of CPUs have changed over the course of their history, but their fundamental operation remains almost unchanged.

Principal components of a CPU include the arithmetic logic unit (ALU) that performs arithmetic and logic operations, processor registers that supply operands to the ALU and store the results of ALU operations and a control unit that orchestrates the fetching (from memory) and execution of instructions by directing the coordinated operations of the ALU, registers and other components.

Most modern CPUs are microprocessors, meaning they are contained on a single integrated circuit (IC) chip. An IC that contains a CPU may also contain memory, peripheral interfaces, and other components of a computer; such integrated devices are variously called microcontrollers or systems on a chip (SoC). Some computers employ a multi-core processor, which is a single chip containing two or more CPUs called “cores”; in that context, one can speak of such single chips as “sockets”.

Array processors or vector processors have multiple processors that operate in parallel, with no unit considered central. There also exists the concept of virtual CPUs which are an abstraction of dynamical aggregated computational resources.

A

A-GPS (Assisted GPS)  •  A2DP (Advanced Audio Distribution Profile)  • AAC (Advanced Audio Coding) •  Airplane Mode  •  Alarm Clock  •  AMOLED (Active-matrix organic light-emitting diode) •  Analog Technology  •  Android Operating System  •  Antenna  •  Aperture •  APN (Access Point Name) •  Apple iOS  •

B

Band   Bandwidth  •  Battery Charging    Biometrics    Bit  BlackBerry OS   Bluetooth    Bps (Bits per Second)   Brand    Broadband    Browser    Byte

C

Camera    Capacitive Touchscreen   Car Kit   Carrier   CDMA (Code-Division Multiple Access)  •  Cell    Chipset    CIF (Common Intermediate Format)  •  Connected GPS    Corning Gorilla Glass    CPU (Central Processing Unit)

D

DC-HSDPA (Dual Carrier or Dual Cell High-Speed Downlink Packet Access)  •  Dual-band    Dual-Mode Dual-SIM     Dynamic Memory

E

EDGE (Enhanced Data for Global Evolution)   •   EDR (Enhanced Data Rate)    EGPRS    EGSM (Extended GSM)

F

Firmware   •  Flash Memory   Flight mode  •  FM Radio  •  Frequency   FTP (File Transfer Protocol)

G

Galileo (Global Navigation Satellite System)   GB (Gigabyte)  •   Gbps (Gigabits per second)   Geo-tag  GLONASS (Global Navigation Satellite System)   GPRS    GPS (Global Positioning System   •  GPU (Graphics Processing Unit)

H

H.263   H.264   H.265   Handwriting recognition  •  Hot Spot    HSCSD (High-Speed Circuit Switched Data)   HSDPA (High-Speed Downlink Packet Access)   HSDPA+ (High-Speed Downlink Packet Access Plus)   HSP (Headset Profile)     HTML (Hypertext Markup Language)   Hz (Hertz)

I

iDEN (Integrated Digital Enhanced Network)    Image Signal Processor (ISP)   •  IMEI (International Mobile Equipment Identity)

J

Java

K

KB (Kilobyte)   •   Kbps (Kilobits per second)   •   Key Guard

L

LCD (Liquid Crystal Display)   •   LED (Light-Emitting Diode)   •   Li-Ion (Lithium Ion)   •   Li-Polymer (Lithium Polymer)   •   Loudspeaker

M

Macro  •  Magnetometer   mAh  •  MB (Megabyte)  •   Mbps (Megabit per second)  •  Megapixel  •  Memory card slot   Memory effect   Messaging   MHz (Megahertz)   Micro USB    microSD   microSDHC   MIDI (Musical Instrument Digital Interface)   MIDP (Mobile Information Device Profile)   MMS (Multimedia Messaging Service)  •   Mobile games   Mobile High-Definition Link (MHL)  •   Mobile IM (Instant Messaging)  •  Modem   •  Monochrome  •   MP3 (MPEG Layer 3)  •   MPEG (Motion Picture Experts Group)   MPEG-4 video   Multitouch input method   Music playback time (battery life)   Music Player

N

NAND Memory   Network capacity   Network coverage  •  NOR Memory   Numeric keypad

O

OEM (Original Equipment Manufacturer)   OLED (Organic Light-Emitting Diode)   Optical Zoom   OS (Operating System)   OTA (Over-The-Air)   OTG

P

PCS (Personal Communications Service)   PDA (Personal Digital Assistant)    Pixel    Pixel density (Pixels Per Inch)  Price    PTT (Push-To-Talk)   Push

Q

Quad-band   QVGA (Quarter Video Graphics Array)    QWERTY keyboard layout

R

RAM (Random-Access Memory)   RBDS (Radio Broadcast Data System)    RDS (Radio Data System)   Resistive touchscreen    Resolution  •  Ringtone   Roaming   ROM (Read-Only Memory)   RS-MMC (Reduced-Size Multi Media Card)

S

Screen protection    SD (Secure Digital)    Secondary camera    Sensors  SIM   SIM lock    Single-Band   Smart Watch    Smartphone  •  SMS (Short Messaging Service)    Speed Dial   Stand-by time (battery life)    Stereo Speakers    Streaming Video    Stylus

T

Talk time (battery life)  Tethering    Text messaging (texting)    Touchscreen   Tri-band

U

UI (User Interface)  •  UMTS  •  UPnP (Universal Plug and Play)    USB (Universal Serial Bus)   USB On-The-Go   USIM

V

VGA (Video Graphics Array)    Video call  Voice dialing   Voice mail  •  VPN (Virtual Private Network)

W

WAP (Wireless Application protocol)  WCDMA(Wideband Code Division Multiple Access    Wearable Technology  •  Wi-Fi   Windows Mobile    Windows Phone OS    WLAN    WMV (Windows Media Video)

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2G   •   3G   •   4G   •  5G

 

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