What is ASCII?
History of ASCII code:
ASCII Code (English acronym for American Standard Code for Information Interchange, American code words (U.S.) Standard for Information Interchange) (pronounced Aski) was created in 1963 by the American Standards Committee or "ASA", this organization changed its name in 1969 for "American National Standards Institute" or "ANSI" as it is known since then. This code was born from rearrange and expand the set of symbols and characters as used in telegraphy at that time by the company Bell. At first only included the capital letters, but in 1967 he added the lowercase letters and some control characters, forming what is known as US-ASCII, ie codes 0 to 127. So with this set of only 128 characters was published in 1967 as standard, containing all you need to write language English. 1986, the standard was modified to add new Latin characters needed for writing text in other languages, such as eg Spanish, thus was added the ASCII characters ranging from 128 to 255. Almost all computer systems today use the ASCII code for representing characters and texts (9308). The computer memory stores all the information digital format. There is no way to store characters directly. Each character has an equivalent digital code. This is called ASCII (American Standard Code for Information Interchange). The basic ASCII characters represented using 7 bits (for 128 possible characters, numbered from 0 to 127).
- The codes from 0 to 31 are not used for characters. These are called control characters because they are used for actions such as:
- Carriage return (CR)
- Timbre (BEL)
- The codes represent 65 to 90 capital letters.
- Codes 97 to 122 lowercase letters represent
(If we change the 6th bit, we go from uppercase to lowercase, this is equivalent to adding 32 to ASCII code in decimal).