dual key system
41Francis Scott Key Bridge (Baltimore) — Infobox Bridge bridge name= Francis Scott Key Bridge caption= official name= carries= 4 lanes of MD 695 crosses= Patapsco River locale= maint= Maryland Transportation Authority id= design= continuous truss arch bridge with suspended plate girder… …
42Fuzzy locating system — Fuzzy locating is a rough but reliable method based on appropriate measuring technology for estimating a location of an object. The concept of precise or ‘’crisp locating’’ is replaced with respect to the operational requirements and the economic …
43Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… …
44Health care system — A health care system is the organization of people, institutions, and resources to deliver health care services to meet the health needs of target populations. There is a wide variety of health care systems around the world, with as many… …
45Interstate Highway System — Interstate redirects here. For other uses, see Interstate (disambiguation). Interstate Highways in the 48 contiguous states. Dark orange routes are built and open freeways, blue are open auxiliary routes, and green dashed indicates proposed… …
46Ignition system — For other uses, see Ignition system (disambiguation). An ignition system is a system for igniting a fuel air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used …
47IBM System/3 — The IBM System/3 (introduced 1969 discontinued 1985) was a low end business computer aimed at new customers and organizations that still used IBM 1400 series computers or unit record equipment. It was the first member of what IBM refers to as… …
48Mile Road System (Detroit) — The Mile Road System in southeast Michigan was established as a way to delineate east west roads through the Detroit area and the surrounding rural rim.HistoryThe Mile Road System, and its most famous road, 8 Mile Road, came about largely as a… …
49Oklahoma Teachers' Retirement System — is the pension program for public education employees in the State of Oklahoma. As of April 30, 2010, the program had nearly 169,000 members.[1] Public education teachers and administrators are required to be OTRS members; support staff can join… …
50EAC (cable system) — EAC (East Asia Crossing) is a submarine telecommunications cable system interconnecting several countries in Asia.Landing points are:# Changi, Singapore # Tseung Kwan O, Hong Kong # Qingdao, China (later extension) # Pali, Taiwan # Capepisa, The… …
