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A trip computer is an onboard computer
Computer

A computer is a machine that manipulates Data according to a list of Code .The first devices that resemble modern computers date to the mid-20th century , although the computer concept and various machines similar to computers existed earlier....
 device fitted to cars which can generally record distance travelled, average speed, average fuel consumption, and display real time
Real Time

Real Time is a webcast based on the long-running United Kingdom science fiction television series Doctor Who which was then subsequently released on CD....
 fuel consumption information. This computer can be found in various vehicles.

The first trip computers were installed in late 1970s General Motors
General Motors

General Motors Corporation , founded in 1908, is the world's second-largest automaker after Toyota, ranked by 2008 global unit sales. GM was the global sales leader for 77 consecutive calendar years from 1931 to 2008....
 products and are still usually reserved for more upscale cars although some lower-end models are fitted with them, often as an option.






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A trip computer is an onboard computer
Computer

A computer is a machine that manipulates Data according to a list of Code .The first devices that resemble modern computers date to the mid-20th century , although the computer concept and various machines similar to computers existed earlier....
 device fitted to cars which can generally record distance travelled, average speed, average fuel consumption, and display real time
Real Time

Real Time is a webcast based on the long-running United Kingdom science fiction television series Doctor Who which was then subsequently released on CD....
 fuel consumption information. This computer can be found in various vehicles.

The first trip computers were installed in late 1970s General Motors
General Motors

General Motors Corporation , founded in 1908, is the world's second-largest automaker after Toyota, ranked by 2008 global unit sales. GM was the global sales leader for 77 consecutive calendar years from 1931 to 2008....
 products and are still usually reserved for more upscale cars although some lower-end models are fitted with them, often as an option. They can range from basic to complex. The most basic varieties of the trip computer incorporate average fuel mileage and perhaps an outside temperature display. Middle-of-the-road versions will often incorporate trip information into a bundle and include information on fuel, speed, distance, cardinal heading (compass), and elapsed time. The most advanced trip computers are reserved for high-end cars and often feature average calculations for two drivers, a stop watch, tire pressure information, an over-speed warning tone, as well as a multitude of other features.

Sometimes the trip computer display will be incorporated into the gauge cluster, into the dashboard or navigation system screen, or in an overhead console. Some vehicles will convey maintenance information to the driver to inform them of scheduled maintenance. The current Acura TL
Acura TL

The Acura TL is a mid-size luxury car from Honda's Acura brand. It was introduced in 1996 to supplant the Acura Vigor and was rebadged for the Japanese-market from 1996 to 2000 as the Honda Inspire and from 1996 to 2004 as the Honda Saber....
 does this in stages, first alerting the driver with a 'Due Soon' message. Once the programmed mileage is reached, it alerts 'Due Now'. If the vehicle is driven past a certain point, the message will change to 'Past Due'. Mercedes-Benz vehicles constantly monitor the quality of the oil and alert the driver of the need of a change when the oil degrades to a certain extent.

Some trip computers can display the diagnostic codes mechanics use. This is specially useful when the mechanic wants to see what the codes are while driving the car. In 2004 Linear Logic
Linear logic

fr:Logique lin?aireLinear logic is a substructural logic invented by Jean-Yves Girard as a refinement of both classical_logic and intuitionistic logic, combining the symmetries of the former with many of the Constructivism_ properties of the latter....
 developed the ScanGauge which is the only easily installed (via OBDII) accessory that works as a trip computer, 4 simultaneous digital gauges, and a diagnostic trouble code reader. This device has available 12 different measurements which can be used as the 4 digital gauges. The units of measure can be independently selected between Miles/km, Gallons/Liters, Celsius/Fahrenheit, and PSI/KPA.

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