Download (166kB) - Sheffield Hallam University Research Archive
Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage,...
-
Upload
kellie-cook -
Category
Documents
-
view
212 -
download
0
Transcript of Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage,...
![Page 1: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/1.jpg)
Semester One 2001/2002
Sheffield Hallam University 1
What is a Computer?
• System for storage, processing, communication of information– Hardware refers to physical
components which, if dropped, would break!
– Software is the term for sets of programs: specially coded instructions that tell the hardware how to behave
![Page 2: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/2.jpg)
Semester One 2001/2002
Sheffield Hallam University 2
What is a Personal Computer?
• Generally any computer small and cheap enough to be owned by one person - Archimedes, Macintosh, Atari etc.
• Ususally refers to particular type - IBM compatible
• Commonly known as PC
![Page 3: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/3.jpg)
Semester One 2001/2002
Sheffield Hallam University 3
IBM and Clones
• In 1981 IBM produced first PC– cost £3000– 1% of power of today’s machines
• Other companies made ‘clones’– higher specifications– lower cost
• Now very few PCs are actually IBM
![Page 4: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/4.jpg)
Semester One 2001/2002
Sheffield Hallam University 4
IBM and Clones
• Operating System is a set of programs to:– enable user communication– control behind-the-scenes activity
• Microsoft supplied OS for IBM PCs– PC-DOS (Disk Operating System)
• Also sold as MS-DOS to clone makers
![Page 5: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/5.jpg)
Semester One 2001/2002
Sheffield Hallam University 5
Overview of PC Components
• System unit• Monitor• Keyboard and mouse• Printer• Software
![Page 6: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/6.jpg)
Semester One 2001/2002
Sheffield Hallam University 6
System Unit• Otherwise known as computer or
machine• Case with buttons, lights, slot for
floppy disks, plug sockets at the rear• Inside
– hard and floppy disk drives– motherboard– processor, memory and expansion slots
![Page 7: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/7.jpg)
Semester One 2001/2002
Sheffield Hallam University 7
Monitor
• Looks like a TV– most frequently used output device
• means of viewing the results of the computer’s processing
– connects to the system unit by two cables• one draws power• other receives information from display
adaptor housed on motherboard
![Page 8: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/8.jpg)
Semester One 2001/2002
Sheffield Hallam University 8
Keyboard and Mouse
• Both input devices• Keyboard communicates
characters typed via multi-core cable (signal and power)
• Mouse is most common pointing device– communicates different things
according to position when clicked
![Page 9: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/9.jpg)
Semester One 2001/2002
Sheffield Hallam University 9
Printer
• After monitors, printer most common output device
• Unlike components so far, printer can be bought separately from PC package
• Two basic types:– impact (Dot Matrix)– non-impact (Laser and Inkjet
![Page 10: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/10.jpg)
Semester One 2001/2002
Sheffield Hallam University 10
Software
• Minimum software requirement is OS
• Other kinds of software are applications– word processors– spreadsheets– games– programming languages
![Page 11: Semester One 2001/2002 Sheffield Hallam University1 What is a Computer? System for storage, processing, communication of information –Hardware refers to.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649e605503460f94b5b417/html5/thumbnails/11.jpg)
Semester One 2001/2002
Sheffield Hallam University 11
Desktops and Notebooks• Desktops
– sit on your desk and don’t move often– plenty of room inside for expansion
and upgrading
• Laptops– first of the portable PCs around 1980s
• Notebooks– size of a telephone directory– much dearer than desktops