bitmap

A bit map (often spelled "bitmap") defines a display space and the color for each pixel or "bit" in the display space. A Graphics Interchange Format and a JPEG are examples of graphic image file types that contain bit maps.

A bit map does not need to contain a bit of color-coded information for each pixel on every row. It only needs to contain information indicating a new color as the display scans along a row. Thus, an image with much solid color will tend to require a small bit map.

Because a bit map uses a fixed or raster graphics method of specifying an image, the image cannot be immediately rescaled by a user without losing definition. A vector graphics graphic image, however, is designed to be quickly rescaled. Typically, an image is created using vector graphics and then, when the artist is satisfied with the image, it is converted to (or saved as) a raster graphic file or bit map.

download

Downloading is the transmission of a file from one computer system to another, usually smaller computer system. From the Internet user's point-of-view, to download a file is to request it from another computer (or from a Web page on another computer) and to receive it.

To copy data (usually an entire file) from a main source to aperipheral device. The term is often used to describe the process of copying a file from an online service or bulletin board service (BBS)to one's own computer. Downloading can also refer to copying a file from a network file server to a computer on the network.

In addition, the term is used to describe the process of loading afont into a laser printer. The font is first copied from a disk to theprinter's local memory. A font that has been downloaded like this is called a soft font to distinguish it from the hard fontsthat are permanently in the printer's memory

The opposite of download is upload, which means to copy a file from your own computer to another computer.

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