Computer Terms

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802.11
A set of Standards for short-range radio frequency wireless networks – has A, B, G and N flavors

Airport
Apple’s name for it’s 802.11 compliant wireless hardware and software

alias
a small file which points to another file – user action on an alias affects the file pointed to

analog
using information represented by a continuously variable physical quantity such as spatial position or voltage

application
a complex program, generally with a polished GUI and large range of user controlled capabilities

ASCII
(pronounced “ask’ ee”) American Standard Code for Information Interchange – a character encoding based on the English alphabet (128 characters/95 Printable)

ASP
Active Server Pages – a Microsoft method for imbedding code on a web page

bandwidth
the range of frequencies which a device can handle, Commonly used to refer to a network’s carrying capacity

binary
using base two numbers

bit
one binary digit – “1” or “0”

black box
a component of a system that has known inputs and outputs but of which the internal workings are unknown

boot
from “bootstrap” – computer startup involving the loading of instructions on how to load further instructions (i.e the OS )

broadband
a high bandwidth internet connection (what is considered “high” tends to increase over time)

byte
eight bits

Classic
1) original Macintosh operating system (versions 1 – 9)
2) the interface for running OS 9 from within some versions of OS X

click
to press and release a pointing device button

client
the data requester in a client -server relationship

client-server
a software model for the movement of data on a network in which one computer acts as a file ?server’, granting or refusing requests for data from other computers acting as “clients”

clipboard
logical area which holds information cut or copied

command key
key on either side of the space-bar ? represented by “?” AKA “the Apple key”

command line
text based interface

computer
data processing machine

contextual menu
context-sensitive menu revealed by right(or control)-clicking

control key
third key to left of the space-bar ? represented by “^”

CPU
central processing unit ?refers to the processor or the case which contains it

CSS
Cascading Style Sheets – a way of separating formating information from content in web pages

cursor
element on the screen which responds to pointing device input

data
information

default
preset value or behavior

desktop
computer screen background

device
an electronic and/or electro-mechanical peripheral connected to a computer

digital
using information represented by discrete values (digits)

directory
1) a file containing location information for the set of files on a volume or within a folder
2) alt. name for a folder

DNS
Domain Name Server – index on a network which cross-references domain names (i.e. apple.com) with IP addresses

Dock
graphical bar containing icons of application s and/or document s allowing for quick access

document
a file created within an application by a user

double-click
two rapid clicks of primary or left mouse button

drag
a pointing device action involving:
1) moving the cursor over an onscreen object
2) pressing and holding the primary mouse button down while…
3) moving the cursor with the selected object to the desired location
4) releasing the button

drag and drop
dragging to move (or copy with option key) a selected item

eject
un-mount a volume and/or physically remove disk from computer

file
a logical unit of information storage

Finder
The application on the Mac OS which allows the user to view, move, copy and otherwise manipulate the files on any volume mounted on that system. The Finder, which always runs on a booted Mac system, is more or less analogous to the Windows Explorer on the Windows OS.

filename extension
three or more letters following a dot (.) at the end of a file name identifying the file’s type

Flash
a program developed by Macromedia (and now owned by Adobe) for delivering vector based graphics and animation over the web.

folder
a logical arrangement of files often appearing as a file folder icon in a GUI – AKA directory

FTP
File Transfer protocol – a client -server protocol for exchanging files over a network

GUI
graphical user interface ? sometimes pronounced “gooey” – generally involves a pointing device, drop down menus, icons

hard drive
a device which stores data magnetically on a spinning metal disk

Home folder
place where all of a user’s files are stored (OS X path: Macintosh HD:Users:yourusername)

HTML
Hypertext Markup Language – a standard for the creation of hypertext document s

HTTP
Hypertext Transport protocolclient server protocol designed for the delivery of hypertext document s

hypertext
document containing automated cross-references to other document s called hyperlinks. Selecting a hyperlink causes the computer to load and display the linked document.

icon
a small onscreen graphic representing something – usually a volume , directory, file or application

IMAP
Internet Message Access protocol – common e-mail protocol allowing a client to receive incoming mail from the server. It allows users to access new messages instantly

insertion point
blinking vertical bar indicating where typed text input will appear ? sometimes also called the caret

install
to place a program’s files onto the hard drive of a computer in a way which allows the program to be accessed and run

installer
a program which installs another program

internet
internetwork – a network of networks. “The Internet” is the worldwide, publicly accessible network of interconnected computer networks that transmit data by packet switching using the standard Internet protocol (IP).

IP
Internet protocol – a method used for communicating data across a packet-switched internet work.

IP address
a computer address – a unique address used by some electronic devices to identify and communicate with each other on a computer network by means of IP

ISP
Internet Service Provider – company providing computer internet connection

Java
an object oriented programing language well suited for use on the internet

Java Applet
a client side method for creating rich web content using Java – a small Java application which runs through a web browser

Javascript
a scripting language for adding interactivity to web pages, it appears similar to Java, but is not related

JSP
Java Sever Pages – a method of imbedding Java instructions on the web page

kernel
the core of a Unix OS ? the open source OS X kernel is called “Darwin”

launch
to activate an application

library
file or folder containing information used by the OS or an application generally not directly accessed by user

Local Area network (LAN)
a network, generally ethernet or wireless, shared by a physically local set of devices.

log in
opening and activating a user account on a computer, network, or website – generally requires entering a user name and password

memory
data storage area

menu
a list of commands – generally refers to a “drop-down” menu revealed by clicking in an appropriate place

menu bar
graphical bar at top of screen with words or icons which can be clicked to reveal drop-down menus

modifier keys
keys pressed while clicking which modify the effect of the click

mount
cause the OS to recognize a volume – generally includes displaying it within the interface

mouse
common pointing device

network
a group of computers and/or peripherals connected together to allow file sharing and shared access to resources like internet and peripherals

open source
software for which the editable source code is freely available

operating system (OS)
software which handles basic computer operations such as communications among the CPU , memory and devices, maintaining the user interface, and handling user input

option key
key between control and command – represented by “?”

OS X
(pronounced “oh ess ten”) the current Macintosh OS built on Unix

P2P
Peer-to-Peer – as opposed to client -server, a connection between equal peer nodes that simultaneously function as both “clients” and “servers” to the other nodes on the network

packet
formatted block of information carried by a computer network

path
a method of describing the location of a file or directory – for example, the location of the Safari web browser on Mac OS X is represented as /Applications/Safari (UNIX style) or Macintosh HD:Applications:Safari (Macintosh style)

PDF
Portable document Format – A format for “cross-platform” document s – a standard way of share document s by e-mail and web

permissions
information attached to a file or folder controlling who has access – can include read, write and/or execute

pointing device
a device by which the cursor can be moved

POP
Post Office protocol – common e-mail protocol allowing a client to receive incoming mail from the server

Postscript
a page description language used by many printers – the basis for the PDF format

preferences
user alterable behaviors

processor
the integrated circuit chip which performs data processing

program
n. computer code which performs a task – v. to create such code

protocol
the special set of rules that end points in a network connection use when they communicate

RAM
random access memory – integrated circuit chips which hold data temporarily for quick CPU access

restart (or reboot)
to shutdown a running system and then boot it again

right-click
click the right-hand mouse button (Control-click produces same result on Mac OS X)

router
networking device that forwards data packets across an internet toward their destinations – for example, Apple’s Airport Express or Extreme base stations

RTF
Rich Text Format – a common file format for text document s which allows for styled text (i.e. – mixed fonts, bold, italic, centered, justified, etc.)

scroll
move window contents around in the window by using scrollbar, mouse scroll wheel, or trackpad

scrollbar
graphical bar at right or bottom of a window which can be manipulated to reveal window contents hidden due to window size

select
highlight an onscreen object – i.e. by clicking on it or dragging over it

server
the data source in a client -server relationship

Servlets
a server side method for creating rich web content using Java

Shockwave
the name given to the technology of Flash and to the plug-in client needed to view Flash content

SMTP
Simple Mail Transfer protocol – a basic client -server protocol for the sending of e-mail.

software
data containing instructions which the CPU can execute

startup
? same as boot above

switch
device which connects various devices on a LAN. Unlike routers, switches do not assign IP addresses, or forward packets to addresses.

Unicode
an industry standard character encoding designed to allow text and symbols from all of the writing systems of the world to be consistently represented and manipulated by computers

UNIX
a robust, multi-user OS which underlies the Mac OS X GUI

user account
a user’s access to the OS including a login and password, preferences, and file storage

user interface (UI)
the human/computer communications channel

volume
a logical portion of a hard drive or other storage device comprised of a directory and its contents

Web
short for “World Wide Web”

wi-fi
local area wireless networking – see 802.11

Wide Area network (WAN)
a network which connects devices which may be spread over a large physical area, i.e. – the internet

window
a rectangular pane containing a view of the file system, or a document

wireless
without wires, commonly refers to radio frequency 802.11 networks, though now used to refer to internet access through mobile phone technology and short range connectivity via Bluetooth

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