USAS X3.4-1967 AKA US-ASCII

hex 0 1 2 3 4 5 6 7 8 9 a b c d e f
bin 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
0 000 NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI
1 001 DLE XON DC2 XOFF DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US
2 010 SP ! " # $ % & ' ( ) * + , - . /
3 011 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 100 @ A B C D E F G H I J K L M N O
5 101 P Q R S T U V W X Y Z [ \ ] ^ _
6 110 ` a b c d e f g h i j k l m n o
7 111 p q r s t u v w x y z { | } ~ DEL

USAS X3.4-1967 was published 1967-07-07; over fifty dang years ago!

(tho this iteration of the standard allowed several characters alternate forms, it was the debut of the table we still use today)

ASCII’s overwhelming success led to it being the first 128 codepoints & octets of many subsequent encodings (making them supersets of ASCII), including three of the most important:

(the last two are oft conflated: when one says the former, they almost certainly mean the latter; some modern standards like HTML5 canonise this)

UTF-16 (or, so help me, UCS-2) is a garbage encoding for garbage people that should never, ever be used💩

more information about character sets can be found at j teaches u: binary, eventually, maybe, u know, sometime.