GUI(Graphics User Interface)
GUI is a A program interface that takes advantage of the computer’sgraphics capabilities to make the program easier to use. Well-designed graphical user interfaces can free the user from learning complex command languages. On the other hand, many users find that they work more effectively with a command-driven interface, especially if they already know the command language.
Basic Components of a GUI
Graphical user interfaces, such as Microsoft Windows and the one used by the Apple Macintosh, feature the following basic components:Pointer: A symbol that appears on the display screen and that you move to select objects and commands. Usually, the pointer appears as a small angled arrow. Text -processing applications, however, use an I-beam pointer that is shaped like a capital I.Pointing device: A device, such as a mouse or trackball, that enables you to select objects on the display screen.Icons: Small pictures that represent commands, files, or windows. By moving the pointer to the icon and pressing a mouse button, you can execute a command or convert the icon into a window. You can also move the icons around the display screen as if they were real objects on your desk.Desktop: The area on the display screen where icons are grouped is often referred to as the desktop because the icons are intended to represent real objects on a real desktop.Windows: You can divide the screen into different areas. In each window, you can run a different program or display a different file. You can move windows around the display screen, and change their shape and size at will.Menus: Most graphical user interfaces let you execute commands by selecting a choice from a menu.
In addition to their visual components, graphical user interfaces also make it easier to move data from one application to another. A true GUI includes standard formats for representing text and graphics. Because the formats are well-defined, different programs that run under a common GUI can share data. This makes it possible, for example, to copy a graph created by a spreadsheet program into a document created by a word processor.
Many DOS programs include some features of GUIs, such as menus, but are not graphics based. Such interfaces are sometimes called graphical character-based user interfaces to distinguish them from true GUIs.
The First Graphical User Interface
The first graphical user interface was designed by Xerox Corporation’s Palo Alto Research Center in the 1970s, but it was not until the 1980s and the emergence of the Apple Macintosh that graphical user interfaces became popular. One reason for their slow acceptance was the fact that they require considerable CPU power and a high-quality monitor, which were prohibitively expensive.
medicine in mexico pharmacies: Online Pharmacies in Mexico – п»їbest mexican online pharmacies
reputable indian pharmacies http://indiaph24.store/# reputable indian pharmacies
buy prescription drugs from india
http://canadaph24.pro/# canadian pharmacy meds review
buy prescription drugs from india [url=http://indiaph24.store/#]Generic Medicine India to USA[/url] buy prescription drugs from india
buy prescription drugs from india http://indiaph24.store/# indian pharmacy
Online medicine home delivery
mexican rx online: mexican pharmacy – mexican drugstore online
ciprofloxacin mail online: ciprofloxacin generic – ciprofloxacin generic price
buy lisinopril online no prescription india [url=http://lisinopril.network/#]lisinopril 12.5 tablet[/url] lisinopril 12.5 mg tablets
http://ciprofloxacin.tech/# ciprofloxacin 500mg buy online
tamoxifen cancer [url=http://nolvadex.life/#]does tamoxifen cause weight loss[/url] nolvadex steroids
http://nolvadex.life/# tamoxifen vs raloxifene
tamoxifen vs raloxifene [url=http://nolvadex.life/#]nolvadex only pct[/url] effexor and tamoxifen
order propecia pills: order cheap propecia price – buying generic propecia without prescription
lisinopril 3973 [url=https://lisinopril.network/#]lisinopril 2.5 mg tablet[/url] lisinopril 0.5 mg
http://ciprofloxacin.tech/# buy cipro online
https://nolvadex.life/# tamoxifen estrogen
buy cipro: ciprofloxacin generic – ciprofloxacin generic price
buy cytotec [url=https://cytotec.club/#]Abortion pills online[/url] cytotec buy online usa
http://cytotec.club/# buy cytotec online
http://finasteride.store/# cost generic propecia without dr prescription
http://cytotec.club/# Abortion pills online
arimidex vs tamoxifen bodybuilding [url=http://nolvadex.life/#]tamoxifen for sale[/url] how does tamoxifen work
http://ciprofloxacin.tech/# buy cipro cheap
buy propecia price [url=http://finasteride.store/#]buy propecia without rx[/url] buy cheap propecia without rx
cost of propecia online [url=http://finasteride.store/#]cost of cheap propecia[/url] cost of cheap propecia without a prescription
buy cipro: cipro 500mg best prices – buy cipro online
cost for generic lisinopril [url=https://lisinopril.network/#]benicar lisinopril[/url] lisinopril 4 mg
lisinopril hct: best lisinopril brand – lisinopril 20 mg best price
http://ciprofloxacin.tech/# buy ciprofloxacin tablets
buy cytotec over the counter [url=http://cytotec.club/#]Misoprostol 200 mg buy online[/url] Misoprostol 200 mg buy online
http://nolvadex.life/# tamoxifen hormone therapy
http://lisinopril.network/# 60 mg lisinopril
buy cytotec pills [url=https://cytotec.club/#]order cytotec online[/url] cytotec online