31. In 1958, the agency installed the teleprinters in the offices of its clients. 32. Until the end of the 1970s, ADN compiled and distributed news via teleprinters . 33. Using random numbers for cryptography was first done around 1917 for securing teleprinter communications. 34. Canadian Frederick Creed invented the teleprinter in 1902. 35. During the 20th century, technicians tested typewriters and teleprinters by typing the sentence. 36. Messages were first transmitted by Morse code and later by teletypewriters, teleprinter and telex. 37. The Germans also developed a series of teleprinter encryption systems, quite different from Enigma. 38. Early teleprinters used the ITA-1 Baudot code, a five-bit code. 39. A teleprinter attached to a modem could also communicate through standard switched public telephone lines. 40. Shortly afterward a practical teleprinter was patented (, granted July 3, 1917 ).
