► Computers ? - Classified as a device that takes in row data as input and process it and provides information as the output.
► Computer Systems ? - Consists of hardware , software , and users that are necessary to make the computer function and to process data in a meaningful way and store data.
► Computer Hardware
Processor - Brain of the computer.It connect all other components.
Intel - Pentium , Celoron , Xeon
AMD - Duron , Athlon
Sun - SPARC
Centaur - Cyrix
IBM - PowerPC
Motorola - Motorola6800
Memory - Internal storage areas in a computer.
I/O Devices
Input - Keyboard , Mouse , Trackball , scanner
Output - Monitors , Projectors , Printer , speakers
I/O - Joystick , Touch Screen display
Storage Devices - Magnetic tapes , Floppy disks , Hard disks , ZIP disks , CD , DVD , BD , Flash drives , Memory cards
Expansion Cards - VGA(Video Graphics Adaptor) cards , Sound cards , Ethernet cards , TV cards , Data FAX modem cards , USB cards , Fire wire
Others - IrDA(Infra Red) , Blue Tooth , Wi Fi
Chassis - Cover and bays to hold components in computer.
ATX Tower
- Mini Tower
- Mid – size Tower
- Full – size Tower
Desktop
- Desktop Flatbed
- Slim desktop Flatbed
Drive Bays
3 inch Bay - Hard disks , Floppy disks
5 inch Bays - CD drives , DVD drives
Power Supply
In -(110V or 230V) Out - (-12V) to (12V)
Power Connectors
Mini Plug - Floppy drives
Molex - Hard disks , CD DVD drives , SCSI(Small Computer System Interface) drives
12V ATX - Mother board
SATA - SATA (Serial Advanced Technology Attachment) Hard disks , SATA CD DVD drives
Buttons And Indicators
► Evolution of Computers
Mechanical Computer to UNIVAC
Mechanical Computer ?
By - Charles Babbage
In - 1822
Input - punch card
Control Unit - Control or program processor
A Processor - Calculate or Process
Storage - 50 digits X 1000
Output device - Can print final results
UNIVAC ?
By -John Mauchly and J. Prespe Eclert
In - 1947
1st time RAM implement
Program by mathematical language
Both alphabetical and numeric programs
► Modern Day Computers
Super Computers ? - Most powerful computers , thousands of micro processors , sophisticated , expensive computers
Usage : Weather , Chemical Process , US economic predictions , universities , resercher organizations
Mainframe Computers ? - Large powerful systems , users connect and access resources through called terminal , terminals divide into dumb and intelligent ,can handle even more than thousands users at a time , handle a particular task.
Usage : Bank systems , Air line reservations , motor vehicle departments
Mini Computers ? - Less powerful than mainframes , more powerful than personal computers , can handle hundreds of users at a time , small than mainframes , can connect terminals and personal computers
Usage : Libraries , Large stocks
Network Servers ? - If set of computers are interconnect as network , there is a main computer named server for manage and supervise that network. It can share files , printers , internet , emails , databases and etc . .
Usage : As email servers , Proxy servers , File servers , Printer servers , Database servers
Personal Computers ? - Individual users , Small size , ability to act as general purpose machine.
Usage : To send emails , Surf Internet , Document creates , Play games , Hear songs
► Von Neumann Architecture ? - Is a design model for a stored-program digital computer that uses a central processing unit(CPU) and a single separate storage structure(memory) to hold both instructions and data. It named after the mathematician and early computer scientist John von Neumann. Such computers implement a universal tuning machine and have a sequential architecture.
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COMPLETED FIRST LESSON
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