Abstract: A clear language dictionary of items of information to be transmitted is provided for composing messages and is also electronically impressed in first memory elements of sending and receiving computers. Each item of the dictionary is equated to a different octal number and the several octal numbers are impressed in second memories of both of the computers. The sending computer converts each selected item to its equated octal number, and then converts each digit of the equated octal numbers to successive groups of binary digits 0-0-0 to 1-1-1 taken from a color code which is impressed in third memories of both computers and in which the first digit of each group is equated to a first basic color, the second digit is equated to a second basic color, and the third digit is equated to a third basic color.