user-operator maintenance
51Mobile radio — This article is about professional equipment. For mobile radios used in amateur radio, see amateur radio mobile operation. Mobile radio or mobiles refer to wireless communications systems and devices which are based on radio frequencies, and… …
52M16 rifle — Rifle, 5.56 mm, M16 From top to bottom: M16A1, M16A2, M4A1, M16A4 Type Assault rifle Place  …
53Boeing E-4 — E 4B in flight Role …
54Heckler & Koch USP — Type Pistol Place of origin …
55Royal Australian Corps of Signals — Infobox Military Unit unit name=Royal Australian Corps of Signals caption= country=Australia allegiance=Australian Army type=Field Army branch=Australian Regular Army dates=1901 – Present specialization=Military communications command structure=… …
56transportation — /trans peuhr tay sheuhn/, n. 1. the act of transporting. 2. the state of being transported. 3. the means of transport or conveyance. 4. the business of conveying people, goods, etc. 5. price of travel or transport by public conveyance; fare. 6.… …
57Amtrak — For other uses, see Amtrak (disambiguation). Amtrak Map of the Amtrak system (2007) Reporting mark …
58Montreal Metro — Not to be confused with Greater Montreal. Montreal Metro Info …
59National broadband plans from around the world — Broadband is a term normally considered to be synonymous with a high speed connection to the internet. The term itself is technology neutral; broadband can be delived by a range of technologies including DSL, LTE or next generation access. This… …
60Blue box (phreaking) — An early phreaking tool, the blue box is an electronic device that simulates a telephone operator s dialing console. It functions by replicating the tones used to switch long distance calls and using them to route the user s own call, bypassing… …
