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).
1 TTL is part of the Domain Name System. 2  TTLs are set by an authoritative nameserver for each resource record.  TTLs are used for caching purpose. For example, www.dnsknowledge.com TTL value is 86400 seconds, which is 24 hours. The higher a recordâs TTL, the longer the information will be cached, and the less queries a client will have to make in order to find the domain.