| Bertillon system | a system or procedure for identifying persons |
| differential diagnosis | a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs |
| buddy system | a cooperative practice of pairing two or more people together for mutual assistance or safety (especially in recreational swimming) |
| differential blood count | counting the number of specific types of white blood cells found in cubic millimeter of blood, may be included as part of a complete blood count |
| protection tribute | payment extorted by gangsters on threat of violence, every store in the neighborhood had to pay him protection |
| protection | the activity of protecting someone or something, the witnesses demanded police protection |
self-defense
self-defence
self-protection | the act of defending yourself |
| protection trade protection | the imposition of duties or quotas on imports in order to protect domestic industry against foreign competition, he made trade protection a plank in the party platform |
auspices
protection aegis | kindly endorsement and guidance, the tournament was held under the auspices of the city council |
| protective covering | the tough natural covering of some organisms |
| water vascular system | system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration |
| air transportation system | a transportation system for moving passengers or goods by air |
alarm
warning device
alarm system | a device that signals the occurrence of some undesirable event |
audio system
sound system | a system of electronic equipment for recording or reproducing sound |
| backup system | a computer system for making backups |
| basic point defense missile system | a shipboard missile system |
brake system
brakes | a braking device consisting of a combination of interacting parts that work to slow a motor vehicle |
bulletin board system
bulletin board electronic bulletin board
bbs | a computer that is running software that allows users to leave messages and access information of general interest |
cable cable television
cable system
cable television service | a television system that transmits over cables |
closed loop
closed-loop system | a control system with a feedback loop that is active |
color television
colour television
color television system
colour television system
color TV
colour TV | a television that transmits images in color |
communication system
communication equipment | facility consisting of the physical plants and equipment for disseminating information |
| communication system | a system for communicating |
computer
computing machine
computing device
data processor
electronic computer
information processing system | a machine for performing calculations automatically |
computer system
computing system
automatic data processing system
ADP system
ADPS | a system of one or more computers and associated software with common storage |
| control system | a system for controlling the operation of another system |
| coolant system | a cooling system that uses a fluid to transfer heat from one place to another |
cooling system
cooling | a mechanism for keeping something cool, the cooling was overhead fans |
| cooling system engine cooling system | equipment in a motor vehicle that cools the engine |
coude telescope
coude system | a reflecting telescope so constructed that the light is led to a plate holder or spectrograph |
data system
information system | system consisting of the network of all communication channels used within an organization |
defense system
defence system | the weaponry available for the defense of a region |
| differential analyzer | an analog computer designed to solve differential equations |
differential gear
differential | a bevel gear that permits rotation of two shafts at different speeds, used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves |
| drainage system | a system of watercourses or drains for carrying off excess water |
drive line
drive line system | mechanism that transmits power from the engine to the driving wheels of a motor vehicle |
| early warning system | a network of radar installations designed to detect enemy missiles or aircraft while there is still time to intercept them |
| electrical system | equipment in a motor vehicle that provides electricity to start the engine and ignite the fuel and operate the lights and windshield wiper and heater and air conditioner and radio |
| electrical system electrical plant | utility that provides electricity |
escarpment
escarp
scarp
protective embankment | a steep artificial slope in front of a fortification |
exhaust
exhaust system | system consisting of the parts of an engine through which burned gases or steam are discharged |
explosive detection system
EDS | a rapid automatic system to detect plastic explosives in passengers' luggage using Xay technology and computers, designed for use in airports |
fiber-optic transmission system
fibre-optic transmission system
FOTS | a communication system using fiber optic cables |
field-sequential color television
field-sequential color TV
field-sequential color television system
field-sequential color TV system | an early form of color TV in which successive fields are scanned in three primary colors |
| fire control system | naval weaponry consisting of a system for controlling the delivery of fire on a military target |
fuel injection
fuel injection system | mechanical system to inject atomized fuel directly into the cylinders of an internalombustion engine, avoids the need for a carburetor |
| fuel system | equipment in a motor vehicle or aircraft that delivers fuel to the engine |
| gas system | facility (plant and equipment) for providing natural-gas service |
Global Positioning System
GPS | a navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver |
guidance system
guidance device | a system of equipment for automatically guiding the path of a vehicle (especially a missile) |