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Appendix E: Glossary
window’s contents t within the current window size, the scroll bars will not appear.
The scroll bar contains a slider that the user can click and drag to scroll through the window. As you may
have noticed, the size of the slider may change for different windows. This is because the slider’s size represents
what percentage of the window’s content is currently being displayed within the window. For example, a slider
that takes up 75% of the scroll bar means 75% of the content ts within the current window size. A slider that
lls only 10% of the scroll bar means only 10% of the window’s contents are being displayed within the current
window size. Therefore, if two windows are the same size, the one with the smaller slider has more content than
the one with the larger slider.
Most scroll bars also contain up and down or left and right arrows that allow the user to scroll in small
increments by clicking the arrows. However, clicking and dragging the slider is much faster, so the arrow keys
are typically not used as often. Also, some mice have a scroll wheel that allows the user to scroll by dragging
the wheel instead of clicking and dragging within the scroll bar.
System Tray [Windows Operating Systems]
Located on the right side of the Windows toolbar. It is the collection of small icons on the opposite side
of the Start Menu. The volume control and the date & time are default items in the systray and many more can
be added. Some common icons that get placed in the systray are virus-scan, mouse, and instant messenger icons.
They usually get put in the systray (whether you like it or not) when their respective programs are installed.
The nice thing about the systray is that it allows quick and easy access to programs and control settings.
Most systray icons will open a control panel or program when double-clicked. However, if you install too many
of them, the area can get so cluttered, you may nd it easier to just browse your hard drive and open the pro-
gram.
True Type Fonts
A TrueType font le includes many different kinds of information used by the TrueType rasterizer and the op-
erating system software to ensure that characters display on the computer screen or print out exactly as the font
designer intended them to. All of the information in a TrueType font is arranged in a series of tables.
Update
Improvements upon the features of the software that are already available
Upload
Places the le from the computer to the memory card
USB (Universal Serial Bus)
USB is a way for your computer to connect to external devices. It’s fast, easy to use, and allows you to
use tons of devices all strung together. Most newer computers have one or more USB ports.
Speed issues aside, one of the big advantages with a USB device is that it can be plugged in while your
computer is running. When you do, Windows automatically “sees” the device and you’re all set to go. If it’s a
rst time run, Windows simply asks for the device’s setup disk. It takes Plug & Play to the level it’s supposed to
be at!
Username
A username is a name that uniquely identies someone on a computer system. For example, a computer
may be setup with multiple accounts, with different usernames for each account. Many websites allow users to
choose a username so that they can customize their settings or set up an online account. For example, your bank
may allow you to choose a username for accessing your banking information. You may need to choose a user-
name in order to post messages to a certain message board on the Web. E-mail services, such as Hotmail require
users to choose a username in order to use the service.
A username is almost always paired with a password. This username/password combination is referred
to as a login, and is often required for users to log in to websites. For example, to access your e-mail via the
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