Year 70 (LXX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Vespasianus (or, less frequently, year 823 Ab urbe condita). The denomination 70 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Call waiting (or catch phone in Japan), in telephony, is a feature on some telephone networks. If a calling party places a call to a called party which is otherwise engaged, and the called party has the call waiting feature enabled, the called party is able to suspend the current telephone call and switch to the new incoming call (typically, this is done by pushing the flash button), and can then negotiate with the new or the current caller an appropriate time to ring back. Call waiting, then, alleviates the need to have more than one line for voice communications.