Involves knowledge of the Internet and World Wide Web and the ability to take advantage of their resources and to critically judge the information.
An electronic device that accepts data (raw facts) as input, processes, or alters them in some way and produces useful information as output.
A computer manipulates data by following step-by-step instructions.
take data that humans understand and digitize those data, that is, translate them into binary forms of ones and zeroes, ones and offs that the computer processes;
manipulates data; output devices produce information that people understand; memory and secondary storage devices
Secondary Storage Devices
hold information, data, and programs.
Persongal Digital Assitants
Personal Digital Assistants (PDAs)
Small handheld computers
used for business input/output such as paychecks or processing medical insurance claims.
are scaled down mainframes; they are multiuser computers that are used by small businesses.
(Personal Computer) are powerful enough for an individuals needs in world processing, spreadsheets, and database management.
is a single-purpose computer on a chip of silicon, which is embedded in anything from appliances to humans. An embedded computer may help run your car, microwave, pacemaker, or watch
Physical components of a computer
Binary Digits (bits)
Inside the computer, all data are represented by the binary ditis (bits) 1 (one) and 0 (zero). To translate 1s and 0s is to digitize.
To translate 1s and 0s is to digitize.
Keyboards and direct-entry devices
Direct entry devices
include pointing devices, scanning devices, smart and optical cards, speech and vision input, touch sensors, and human biology input devices.
You can use to position the insertion point on the screen, or make a choice from a menu. Other variations are: Light pens, digitizing tablets, and pen-based systerms.
Digitize data by shining a light on an image and measuring the reflection.
Radio Frequency Indentification tags
Radio frequency indentification (RFID) tags
input devices are not used to indentify anything from the family dog to the sponge the surgeon left in your body by sending out radio waves.
A sensor is a device that collects data directly from the environment and sends those data to a computer.
Indentify people by their body parts. Biometrics include fingerpritns, hand prints, face recognition and iris scans.
has two parts- arithetic-logic unit, which performs arithemtic operations and logical operations of computer and the control unit, which directs the operation of the computer in accordance with the programs instructions.
Random Access Memory (RAM)
The part of the momory where current work is termporarily stored during processing
Read Only Memory
Read Only Memory (ROM)
Or fireware is contains basic start up instructions, which are burned into a chip at the factory; you can not change the contents of the ROM
allows you to add devices
into which you can plug expansion boards for additional hardware
board has sockets on the outside
use of virtual reality simulators which help in teaching certain produres.
translate language of bits into a form humans can understand. Output devices are in two categories; those that produce hard copy including printers and plotters and those that produce soft (digital) copy, including monitors, speakers.
store data and programs as magnetic spots or electromagnetic charges.
Compact Disks (CDs)
store data as pits and lands burned into a plastic disk.
Solid-state memory devices
flash memory cards used in notebooks, memory sticks and very compact key chair devices. USB flash drives have a huge capacity for information.
step by step instructions that tell the hardware what to do.
consists of programs that let a computer manage it's resources.
is a group of programs that manage and organize resources of the computer.
user communciates with the computer for example, windows provides graphich user interfact, pictures or icons that you click on with a mouse.
allows you to apply computer technology to a task you need done.
Word processing software
allows you to enter text for a paper, report, letter or memo
allow you to process numerical data.
Database management software
permits you to manage large quantities of data in an organized fashion.
Web browsers, such as IE (Internet Explorer)
The fact that computers can be connected
Computers and other hardware devices that are connected
Local Area Network (LANs)
Small, which span one room
Wide Area Network (WANs)
span a state, nation or even globe, like WWW, and Internet
Connected through telephone lines
Transmission is governed by sets of technical standards or rules
Wireless tehncology that allows you to connect to laptop, pda, phone, etc...
Internet (Internconnected network)
is a global network of networks, connecting innumerable smaller networks, computers and user.
The Internet orginated in?
Private corporate of hospital networks that use the same structure as the Internet
software used to protect the intranet from unauthorized users.