COMPUTER –AnOv Overvi ew
ABACUS About 3000 B. C. ,Babyl oni ans i nvent ed ABACUS.I ti s an addi ng t oolt hat can hel p you by addi ng and subt r act i ng by mo movi ng beads back and f r onton r ods.Theabacus wa w as one of t he ear l i est count i ng devi ce i nvent ed t o hel p man t o sol vehi scount i ngpr obl ems ms.
ABACUS About 3000 B. C. ,Babyl oni ans i nvent ed ABACUS.I ti s an addi ng t oolt hat can hel p you by addi ng and subt r act i ng by mo movi ng beads back and f r onton r ods.Theabacus wa w as one of t he ear l i est count i ng devi ce i nvent ed t o hel p man t o sol vehi scount i ngpr obl ems ms.
Whati sComput er ? Co mput eri s a combi nat i on ofel ect r oni c
de vi ces.
A s an el ect r oni c de vi ce t hat comput eri mani pul at e si nf or mat i on,ordat a.I thas t he abi l i t y t os tore,retrieve, andprocess dat a. he t T er m device r ef er st o any pi ec e of har dwar eused by t hecomput ersuc h as keyboar d, moni t or , mouse, modem, j oys t i c k,e t c.
SOFTWARE
Syst em Sof t war e I thas di r ectcont r oland access t o your comput er har dwar e, and memory l ocat i ons. They per f orm I /O oper at i ons on var i ous memory l ocat i ons, and cont r ol t he har dwar e,t o make the appl i cat i on sof t war e do a task. Oper at i ng syst ems,ar et hemai n exampl esf or syst em sof t war e.
Syst em Sof t war e 1) DOS 2) Mi cr osof tWi ndows 3) Uni x 4) Li nux 5) MacOSX 6) BI OSSof t war e 7) HD Sect orBootSof t war e 8) Devi ceDr i verSof t war e 9) Li nkerSof t war e 10)Assembl erandCompi l erSof t war e
Appl i cat i onSof t war e I t r uns under Syst em Sof t war e,and ar emadet odo a speci fic t ask, whi ch have i ndi r ect access t o t he har dwar e.
Appl i cat i onSof t war e 1)Mi cr osof tOffi ce 2)WebBr owser 3)Dat abaseSof t war e 4)Pr esent at i onSof t war e 5)Musi c/SoundSof t war e 6)Audi o/Vi deoSof t war e 7)GameSof t war e 8)Gr aphi csSof t war e
Ther ear eonl yt wot ypesof peopl ei nt hewor l d:Those whounder st andbi nar yand t hosewhodon' t . -Or acl eI nc.
Bi t sandByt es UNI T
Appr oxi mat eVal ue ( Byt es)
Act ualVal ue( Byt es)
8Bi t s
1
1
Ki l obyt e( KB)
1, 000
1, 024
Megabyt e( MB)
1, 000, 000
1, 048, 576
Gi gabyt e( GB)
1, 000, 000, 000
1, 073, 741, 824
1, 000, 000, 000, 000
1, 099, 511, 627, 776
1, 000, 000, 000, 000, 000
1, 125, 899, 906, 842, 624
Ter abyt e( TB) Pet abyt e( PB)
