The first digit assigned to all Visa cards is four, and the second through sixth numbers are connected to the financial institution. Then, either the seventh through 12th numbers, or the seventh through 15th, are the account number, while that final 13th or 16th digit is the check number.
Limited color, Lossy format, small file. GIF(Graphics Interchange Format) is limited to an 8-bit palette, or 256 colors. This makes the GIF format suitable for storing graphics with relatively few colors such as simple diagrams, shapes, logos and cartoon style images.
Pixels are the smallest image-forming unit of a video display. For example, if a computer's video display has a resolution of 1024 by 768, this is another way of saying that it represents images on the video display using a type of coordinate plane that measures 1024 units by 768 units.