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.
W3c vector graphics image file format. SVG is a file extension for a vector graphics image file format created by the W3C to describe such images by mathematical equations. SVG uses XML (Extensible Markup Language). Some existing variants of SVG in use are SVG 1.0, SVG 1.1 and SVG Tiny 1.2), SVG Tiny (SVGT) and SVG Basic (SVGB).