Pertinent Pertinent was an Australian monthly periodical edited by Leon Batt. Contributors included Ian Mudie, Kylie Tennant, William Hart-Smith, the artist Rosaleen Norton and the poet Gavin Greenlees, Dulcie Deamer, Yvonne Webb, George Farwell, Marjorie Quinn, Marien Dreyer, and Robert Crossland Started in 1940 the magazine ceased publication in 1947.
Part of the Microprocessors glossary: Transistor-transistor logic (TTL) is a digital logic design in which bipolar transistor s act on direct-current pulses. Many TTL logic gate s are typically fabricated onto a single integrated circuit (IC).
ttl= through the lens it takes information for the flash through the lens, not using simply the thyrister on the flash d-ttl did NOT start with digital.....the d stands for distance on nikkon stuff. if you use a d lens too, the flash takes distance into consideration when exposure is made. and the ittl i believe is interactive..allowing multi flash units to communicate wirelessly