COMPUTER AT A GLANCE FUNCTIONS OF KEYS ON KEYBOARD (F1 – F12) - TopicsExpress

COMPUTER AT A GLANCE FUNCTIONS OF KEYS ON KEYBOARD (F1 – F12) Function keys : used to perform special functions depending on the software being used. ENTER : used to communicate with the end of instruction or Data being keyed in by keyboard. CAPS LOCK : Used for keying in capitalized alphabets. Shift : Caps lock off: If pressed simaltanously with a Character key, a capitalized alphabet is input. Ctrl, Alt : Pressed with other keys, they input special messages to the computers. Backspace : used to erase the character to the left of cursor. Num : used to activate numeric keys on numeric pad. Cursor Keys : use to move cursor in direction indicated. HOME : Brings the cursor to the start of the line. END : Brings the cursor to end of the line. PgUp : Move the page upwards (MS Office applications) PgDn : Move the page downwards (MS Office applications CONVERSIONS 1 Nibble : 4 Bits 1 Byte : 8 Bits 1 KB : 1024 Bytes 1 MB : 1024 Kilo Bytes 1 GB : 1024 Mega Bytes 1 Terabyte : 1024 Giga Bytes COMMON FULL FORMS MICR : Magnetic Ink Character Reader OCR : Optical Character Reader OMR : Optical Mark Reader BCR : Bar Code Reader CPU : Central processing Unit VDU : Visual Display Unit ALU : Arithmetic Logical Unit CU : Control Unit RAM : Random Access Memory DRAM : Dynamic Random Access Memory SRAM : Static Random Access Memory FRAM : Ferromagnetic Random Access Memory ROM : Read Only Memory PROM : Programmable Read Only Memory EPROM : Erasable Programmable Read Only Memory EEPROM : Electronically Erasable Programmable Read Only Memory CDROM : Compact Disk Read Only Memory DVDROM : Digital Video Disk Read Only Memory C.G.A : Colour Graphics Adaptor H.G.A : Hercules Graphics Adaptor E.G.A : Enhanced Graphics Adaptor V.G.A : Video Graphics Adaptor O.S : Operating System CUI : Character User Interface GUI : Graphical User Interface DTP : Desk Top Publishing CAD : Computer Aided Design DBMS : Data Base Management System RDBMS : Relational Data Base Management System ATM : Automatic Teller Machine ASCII : American Standard Code for Information Interchange EBCDIC : Extended Binary Coded Decimal Interchange Code BCD : Binary Coded Decimal LAN : Local Area Network WAN : Wide Area Network MAN : Metropolitan Area Network WWW : World Wide Web ARPANET : Advanced Research Projects Agency Network IAB : Internet Architecture Board IRTF : Internet Research Task Force IETF : Internet Engineering Task Force TCP/IP : Transmission Control Protocol/ Internet Protocol HTTP : Hyper Text Transfer Protocol ISP : Internet Service Provider Veronica : Very Easy Robust Oriented Netwide Index to Computer Archives HTML : Hyper Text Markup Language FTP : File Transfer Protocol E-mail : Electronic Mail CBT : Computer Based Training ADC : Analog- to –Digital Conversion