Lec 3 Computer Hardware (Nursing Informatics).pdf
- 1. 1/8/2020 What is a Computer? CHAPTER 6 Computer Hardware specia machin tha perform tasks suc processin an handlin electroni communicatio etc unde the contro o se o instruction calle progra a calculations data . Program usuall resid withi th compute an ar retrieve and processe b th computer’ electronic syste . When compute memor whic tells the compute how t star specifi tas i turne on i searche fo instructions in its u and proces a . Usuall on o th firs set o instruction i specia program calle th operatin system whic compute wor . i the softwar tha make the N U R S I N G I N F O R M ATI C S I CS What is a Computer? What is a Computer? Fou Mai Function : I prompt th use (o othe machines fo inpu an commands, report th result o thes command an othe operation stores, an manage data an control th sequenc o th software and hardwar action . PROCESSESS DATA PRODUCES OUTPUT STORES RESULTS ACCEPTSDATA Whe th use request tha program run th operatin system load th progra i th computer’ memor an run th progra . compute can d billion Failure ar usuall du anoth compute ca kee hug amount o dat . o action pe secon . t huma erro on wa or N U R S I N G I N F O R M ATI C S N U R S I N G I N F O R M ATI C S Range of ComputerAbility Range of ComputerAbility Computer exis i embedde within th circuitry o appliance such as televisions wid rang o size an pow Smalles are Programmable computers vary enormously in their computationa powe speed memor an physica siz . an wristwatche . PD (Persona Digita Assistant sma computer whic can Computer ar typicall preprogramme fo specifi task such b hel addres book connect to worldwide computer networks to exchange informatio regardles locatio Handhel gam device are als example o sma compute i on han suc a notepad schedulin system and a tunin t particula televisio frequenc deliverin dose of i equippe with a cellula phone the can medicine o keepin accurat time o i generall “har wired program ar represente a circuits . tha canno b reprogramme . N U R S I N G I N F O R M ATI C S N U R S I N G I N F O R M ATI C S 1
- 2. 1/8/2020 Range of ComputerAbility Range of ComputerAbility Portable lapto and noteboo computers and deskto PC are typicall used i businesses and a hom to communicate on compute network fo wor processing t trac finance an for entertainmen . Workstation ar simila t persona computer bu hav greater memor an mor extensiv mathematica abilities an the are connected to other workstations or personal computers to exchang dat . Equipped with a keyboard mouse trackball o other pointing devic an vide displa monito o liqui crysta displa (LCD) t displa informatio . Typically found in scientific, industrial, and business environments exchange tha requir comple an fas computations – especially financial ones, such as stock Lapto and noteboo computer usuall have simila hardware and software a PCs bu the are mor compac and have flat, lightweight LCDs instead of television like video display monito Most sources consider the terms laptop and notebook synonymous – . . I CS N U R S I N G I N F O R M ATI C S Main Components Main Components CENTRA PROCESSING UNIT (CP microprocesso “brain o the MEMOR ver fas storag use t hol da i ha t b fast compute syste . becaus connect directl t th microprocessor Specifi type : Random Access Memory (RAM used to temporarily store informatio tha th compute i currentl workin wi Rea Onl Memor (ROM permanen typ memor storage use b th compute fo importan dat tha doe no chang . . o N U R S I N G I N F O R M ATI C S N U R S I N G I N F O R M ATI C S Main Components MEMOR : Main Components MOTHERBOAR mai circui board tha al o th othe internal component connec t Th CP an memor ar usuall her . Specifi type : Basi Inpu Outpu System (BIO typ o RO tha i used b th compute t establis basic communication when the compute i firs turne on Cachin storin o frequentl use dat tha connect directl t th CPU i extremel fas RAM Virtua Memo spac on th har dis use t temporarily stor dat an swa i an ou o RA a neede . N U R S I N G I N F O R M ATI C S N U R S I N G I N F O R M ATI C S 2