Analysis of information sources in references of the Wikipedia article "DEC RADIX 50" in English language version.
[…] PDP-11 systems programs often handle symbols in a specially coded form called RADIX 50 (this form is sometimes referred to as MOD40). This form allows 3 characters to be packed into 16 bits; therefore, any 6-character symbol can be held in two words. The single operand is of the form /CCC/ where the slash (the delimiter) can be any printable character except for = and : . The delimiters enclose the characters to be converted which may be A through Z, 0 through 9, dollar ($), dot (.) and space ( ). If there are fewer than 3 characters they are considered to be left justified and trailing spaces are assumed. […] The packing algorithm is as follows: […] A. Each character is translated into its RADIX 50 equivalent as indicated in the following table: Character - RADIX 50 Equivalent (octal): (space) - 0, A–Z - 1–32, $ - 33, . - 34, 0–9 - 36–47. Note that another character could be defined for code 35. […] B. The RADIX 50 equivalents for characters 1 through 3 (C1,C2,C3) are combined as follows: RESULT=((C1*50)+C2)*50+C3 […][1]
