Discuss the function of a bar code reader and bar codes.

What will be an ideal response?


Student responses will vary, but should be drawn from the following information from the text.

A bar code reader, also called a bar code scanner, is an optical reader that uses laser beams to read bar codes. A bar code is an identification code that consists of either a set of vertical lines and spaces of different widths or a two-dimensional pattern of dots, squares, and other images. The bar code represents data that identifies the manufacturer and the item.

Manufacturers print a bar code either on a product's package or on a label that is affixed to a product, such as groceries, books, clothing, vehicles, mail, and packages. Each industry uses its own type of bar code. The United States Postal Service (USPS) uses a POSTNET bar code. Retail and grocery stores use the UPC (Universal Product Code) bar code.

Computer Science & Information Technology

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Both DSL and cable networks require a device called a(n) ________ to connect to the Internet

Fill in the blank(s) with correct word

Computer Science & Information Technology

You can hide edges using the ____ menu.

A. File B. View C. Edit D. Window

Computer Science & Information Technology

Match each term with the best description.

A. Word document that contains the standard text for each mail-merge letter/label B. Is replaced with the value in the field that the code represents C. Data from an Access object is combined with a Word label or letter D. Helps you step through the process from Access with a Word label or letter

Computer Science & Information Technology

________ indicates a monitor's ability to display colors by comparing the light intensity of the brightest white to the darkest black.

A. Pixel width B. Resolution C. Contrast ratio D. Dot pitch

Computer Science & Information Technology