Foundation of Democracy

Desktop Computers
· Also called personal computers.
· sit on,beside,or under a desktop.
Notebook or Laptops
· Similar to desktops
· Advantages
· Netbook
· Similar to a notebook
· For wireless communication or access to the internet
Tablets
· Looks similar to a notebook
· Touch screens capability
Servers
· A computer dedicated to shaaring resources among 2 or more computers and managing large amounts of data.
Hand-held or Mobile Computers
· Any computing devices that fits in the palm of your hand and is portable.
· Cellular Phones
· Personal Digital Assistants (PDA)
· Music or Media Players (ipods ,Mp3)
· Game systems (wii, playstations)
· Electronic Book Readers (kindle, Nook)
· Calculators
Looking at the system unit
· sometimes called the "Box "or "Tower".
· Most expensive part of the computer system.Devices in the system
· Power supply
· Motherboard
· Micro processor
· Memory
Power Supply
· Supply the necessary power to run components in the systemunit.
Motherboard
· The central printed circuit board in the system unit that holds many of the crucial comporents.
Connecting Devices
· Parallel
· Serial
· Ports
· Universal Serial BUS(USB)
· Network Ports
· Used for connecting to anotheer computer on a network ,a modern ,or to the internet
· Ethernet of firewire
Device Driver
· To enable communication between the operating system and the device.
What is a software Program?
· A step by step set of instructions that tell a computer what to do.
· Software applications are created using program languages.
· A complex code that activate functions and complete tasks.
· Computer software code is based on a set of rules called algerithms
Ergonomics
· Fitting the job to the peoplewho have to do it,through the design of equipment and procedures.
· Fitting the person to the job, through use of placement procedures or training.
· Application requires matching tasks demands and environmental conditions with