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.
1. KolibriOS: Smallest GUI OS. Kolibri is the smallest GUI operating system. It was forked off from MenuetOS. Written completely in assembly language, it is available in two versions: 1.44MB with essential features and 3MB with additional features.lax is a modern, live, pocket operating system based on Slackware Linux. Despite its small size of 220MB, it contains essential apps for basic computing, and you can extend its functionality using modules.