Alphanumeric codes | ASCII code | EBCDIC code | UNICODE

Alphanumeric codes are sometimes called character codes due to their certain properties. Now these codes are basically binary codes. We can write alphanumeric data, including data, letters of the alphabet, numbers, mathematical symbols and punctuation marks by this code which can be easily understandable and can be processed by the computers. Input output devices such as keyboards, monitors, mouse can be interfaced using these codes. 12-bit Hollerith code is the better known and perhaps the first effective code in the days of evolving computers in early days. During this period punch cards were used as the inputting and outputting data. But nowadays these codes are termed obsolete as many other modern codes have evolved. The most common alphanumeric codes used these days are ASCII code, EBCDIC code and Unicode. Now we will discuss about them briefly.

ASCII code

The full form of ASCII code is American Standard Code for Information Interchange. It is a seven bit code based on the English alphabet.
In 1967 this code was first published and since then it is being modified and updated. ASCII code has 128 characters some of which are enlisted below to get familiar with the code.

DECOCTHEXBINSymbolDescription
00000000000000NULNull char
10010100000001SOHStart of Heading
20020200000010STXStart of Text
30030300000011ETXEnd of Text
40040400000100EOTEnd of Transmission
50050500000101ENQEnquiry
60060600000110ACKAcknowledgment
70070700000111BELBell
80100800001000BSBack Space
90110900001001HTHorizontal Tab
100120A00001010LFLine Feed
110130B00001011VTVertical Tab
120140C00001100FFForm Feed
130150D00001101CRCarriage Return
140160E00001110SOShift Out / X-On
150170F00001111SIShift In / X-O

There are many more codes which are not included here.

EBCDIC code

The EBCDIC stands for Extended Binary Coded Decimal Interchange Code. IBM invented this code to extend the Binary Coded Decimal which existed at that time. All the IBM computers and peripherals use this code. It is an 8 bit code and therefore can accommodate 256 characters. Below is given some characters of EBCDIC code to get familiar with it.

CharEBCDICHEXCharEBCDICHEXCharEBCDICHEX
A1100 0001C1P1101 0111D741111 0100F4
B1100 0010C2Q1101 1000D851111 0101F5
C1100 0011C3R1101 1001D961111 0110F6
D1100 0100C4S1110 0010E271111 0111F7
E1100 0101C5T1110 0011E381111 1000F8
F1100 0110C6U1110 0100E491111 1001F9
G1100 0111C7V1110 0101E5blank
H1100 1000C8W1110 0110E6.
I1100 1001C9X1110 0111E7(
J1101 0001D1Y1110 1000E8+
K1101 0010D2Z1110 1001E9$
L1101 0011D301111 0000F0*
M1101 0100D411111 0001F1)
N1101 0101D521111 0010F2
O1101 0110D631111 0011F3/

UNICODE

Unicode is the newest concept in digital coding. In Unicode every number has a unique character. Leading technological giants have adopted this code for its uniqueness. A part of the Unicode table is given below.

01234567890A0B0C0D0E0F101112131415161718191A1B1C1D1E1F
0000­Symbols
0020!#$%&()*+,./0123456789:;<=>?Number
0040@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_Alphabet
0060`abcdefghijklmnopqrstuvwxyz{|}~
0080ƒˆŠŒŽ˜šœžŸ
00A0¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ·¸¹º»¼½¾¿
00C0ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßLatin
000Eàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ
0100ĀāĂ㥹ĆćĈĉĊċČčĎďĐđĒēĔĕĖėĘęĚěĜĝĞğ
0120ĠġĢģĤĥĦħĨĩĪīĬĭĮįİıIJijĴĵĶķĸĹĺĻļĽľĿ
0140ŀŁłŃńŅņŇňʼnŊŋŌōŎŏŐőŒœŔŕŖŗŘřŚśŜŝŞş
0160ŠšŢţŤťŦŧŨũŪūŬŭŮůŰűŲųŴŵŶŷŸŹźŻżŽžſ
0180ƀƁƂƃƄƅƆƇƈƉƊƋƌƍƎƏƐƑƒƓƔƕƖƗƘƙƚƛƜƝƞƟ
01A0ƠơƢƣƤƥƦƧƨƩƪƫƬƭƮƯưƱƲƳƴƵƶƷƸƹƺƻƼƽƾƿ
01C0ǀǁǂǃDŽDždžLJLjljNJNjnjǍǎǏǐǑǒǓǔǕǖǗǘǙǚǛǜǝǞǟ
100EǠǡǢǣǤǥǦǧǨǩǪǫǬǭǮǯǰDZDzdzǴǵǶǷǸǹǺǻǼǽǾǿ
200ȀȁȂȃȄȅȆȇȈȉȊȋȌȍȎȏȐȑȒȓȔȕȖȗȘșȚțȜȝȞȟ
0220ȠȡȢȣȤȥȦȧȨȩȪȫȬȭȮȯȰȱȲȳȴȵȶȷȸȹȺȻȼȽȾȿ
0240ɀɁɂɃɄɅɆɇɈɉɊɋɌɍɎɏɐɑɒɓɔɕɖɗɘəɚɛɜɝɞɟ
0260ɠɡɢɣɤɥɦɧɨɩɪɫɬɭɮɯɰɱɲɳɴɵɶɷɸɹɺɻɼɽɾɿ
0280ʀʁʂʃʄʅʆʇʈʉʊʋʌʍʎʏʐʑʒʓʔʕʖʗʘʙʚʛʜʝʞʟ
02A0ʠʡʢʣʤʥʦʧʨʩʪʫʬʭʮʯʰʱʲʳʴʵʶʷʸʹʺʻʼʽʾʿ
02C0ˀˁ˂˃˄˅ˆˇˈˉˊˋˌˍˎˏːˑ˒˓˔˕˖˗˘˙˚˛˜˝˞˟
200Eˠˡˢˣˤ˥˦˧˨˩˪˫ˬ˭ˮ˯˰˱˲˳˴˵˶˷˸˹˺˻˼˽˾˿
0300̛̖̗̘̙̜̝̞̟̀́̂̃̄̅̆̇̈̉̊̋̌̍̎̏̐̑̒̓̔̕̚
0320̴̵̶̷̸̡̢̧̨̠̣̤̥̦̩̪̫̬̭̮̯̰̱̲̳̹̺̻̼̽̾̿
0340͇͈͉͍͎̀́͂̓̈́͆͊͋͌ͅ͏͓͔͕͖͙͚͐͑͒͗͛͘͜͟͝͞
0360ͣͤͥͦͧͨͩͪͫͬͭͮͯ͢͠͡ͰͱͲͳʹ͵Ͷͷ͸͹ͺͻͼͽ;Ϳ
0380΀΁΂΃΄΅Ά·ΈΉΊ΋Ό΍ΎΏΐΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟGreek
03A0ΠΡ΢ΣΤΥΦΧΨΩΪΫάέήίΰαβγδεζηθικλμνξο
03C0πρςστυφχψωϊϋόύώϏϐϑϒϓϔϕϖϗϘϙϚϛϜϝϞϟ
300EϠϡϢϣϤϥϦϧϨϩϪϫϬϭϮϯϰϱϲϳϴϵ϶ϷϸϹϺϻϼϽϾϿ

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