Task Bar
In the graphical user interface (GUI) for a computer operating system or application, a taskbar is a visual device on the desktop that typically shows the user which applications (tasks) are currently active and running. Some taskbars, such as those in Windows operating systems, also include icons for commonly-used utilities such as the system clock and antivirus software.
TIN
A taxpayer Identification number (TIN) is an employer identification number assigned by the Internal Revenue Service (IRS) when registering a company to do business in the United States.
Tool Bar
In the graphical user interface ( GUI ) for a computer, a toolbar is a horizontal row or vertical column of selectable image "buttons" that give the user a constantly visible reminder of and an easy way to select certain desktop or other application functions, such as saving or printing a document or moving pages forwards or backwards within a Web browser . Most operating system comes with a toolbar. In addition, many application programs, such as word processors and spreadsheet programs come with one or more toolbars as part of their user interface.
Trackball
A trackball is a computer cursor control device used in many notebook and laptop computers. The trackball is usually located in front of the keyboard toward the user. Essentially, the trackball is an upside-down mouse that rotates in place within a socket. The user rolls the ball to direct the cursor to the desired place on the screen and can click one of two buttons (identical to mouse buttons) near the trackball to select desktop objects or position the cursor for text entry.