The Unified EFI Forum or UEFI Forum ( where UEFI stands for Unified Extensible Firmware Interface ) is an alliance between several leading technology companies to modernize the booting process.

Since the early developer builds of Mac OS X v10. 6, members of the OSx86 community had been booting the new operating system using yet another boot loader called PC EFI provided by Russian hacker Netkas or the boot loader of the Voodoo team Chameleon.

, most current operating systems support GPT, although some ( including Mac OS X and Windows ) only support booting to GPT partitions on systems with EFI firmware.

Mac OS has been designed by Apple to only work on Apple computers unless you have an EFI emulator which creates an environment that can boot Mac OS X on a regular PC.

In July 2005 Intel ceased development of the EFI spec at version 1. 10, and contributed it to the Unified EFI Forum, which has evolved the specification as the Unified Extensible Firmware Interface ( UEFI ).

Recently Royal Enfield has undergone a major retooling particularly in the engine department with introduction of twin spark unit construction engine on all its models with EFI available on their flagship 500cc model.

The V8, with a Chrysler-built throttle-body EFI system, was the only available engine.

1984 Charcoal Turbo RS-A Capri RS Turbo that was only available in Charcoal upper / Silver lower exterior paint with Light Grey striped rub mouldings, Garret 60 trim turbocharger, enhanced multiport EFI 4-cylinder engine, Michelin TRX package, 5. 0 HO Sway bars, 3. 45: 1 limited slip rear axle, hood scoop, and orange and red lettering and striping.

* EX Saloon-GA14DE: 1, 392 cc DOHC 16-valve EFI ( power steering only, with stereo )

With the EFI, boaters had only to turn the key and shift into gear.

In September 1978, the 3T-EU engine ( 1, 770 cc OHV EFI ) was installed in the ST-EFI and SR-EFI models, initially only with a five-speed manual.

As of August 1980, the EFI specification 1800 Hard Top ( ST-EFI, SR-EFI ) was the only engine offered in the sedans / coupés.

Some systems ( particularly newer Macintoshes and new editions of Microsoft Windows ) use Intel's EFI.

COFF and its variants continue to be used on some Unix-like systems, on Microsoft Windows, in EFI environments and in some embedded development systems.

This version also adds support for Windows Vista, x64 versions of Windows, and GUID Partition Table ( GPT )- based disks ( although the software does not yet fully support systems with Extensible Firmware Interface ( EFI )- compliant firmware ).

It was thought that Windows 7 support of EFI would result in PC motherboards replacing BIOS with EFI.

Output was and, while European versions produced in standard carburettor trim for vehicles with automatic transmission and for the Fiesta XR2 and the Escort XR3 or Orion Ghia ( twin Weber carburettor ), or fuel-injected ( K-Jetronic ), KE-Jetronic catalyst mechanical fuel injection, ( EFI Electronic fuel injection with Ford EEC-IV engine management ) as found in the XR3i or Orion GLSI.

The 1. 7 L fuel injection ( EFI ) engine with 5-speed transmission was introduced in 1985 as optional on all versions except the base car.

The 3. 0 L engine's power was decreased to 130 kW ( 175 hp / 177 PS ), and the 3. 5 L engine was given gasoline direct injection, increasing power to 162 kW ( 217 hp / 220 PS ) in the Japanese market ( export versions kept the standard EFI engine, now with 149 kW ( 200 hp / 203 PS ).

In addition to the standard PC disk partition scheme, which uses a master boot record ( MBR ), EFI works with a new partitioning scheme: GUID Partition Table ( GPT ).

Likewise, the powertrains were also as fitted to the Toyota with a twin-cam, EFI 2. 2 litre 5S-FE straight-four producing and, with an optional quad-cam EFI 3. 0 litre 3VZ-FE V6 making and.

The engine was now controlled by Bosch Motronic DME 2. 5 ( later DME 2. 7 ) electronic engine management that integrated EFI and ignition control into a single computer unit.

Engine options were either the 1. 8-litre non EFI gasoline, 2. 0-litre EFI gasoline, 1. 8-litre EFI gasoline, or 2. 4-litre diesel engine.

This model ( and upwards ) enabled users to choose which engine they wanted to use-the original ( but renewed ) 2. 0-litre gasoline engine, a 2. 4-litre diesel engine, or the new 1. 8-litre EFI engine.

Two-seat coupe ; 2. 7L, V6, EFI, quad cam, water-cooled, mid-mounted engine ; rear wheel drive ; tiptronic transmission, 4-wheel independent suspension, Carbon Fibre and Kevlar composite body, spaceframe chassis, ABS, EBD, traction control, cruise control, Bluetooth set, tyre pressure monitoring system.

Two-and 2 + 2-seat convertible with soft top or removable hard top ; 1. 8-2. 2L, 4 cylinder, DOHC, EFI, water-cooled, rear-mounted boxer engine ; rear wheel drive ; automatic or manual transmission ; 4-wheel independent suspension.

2 + 2-seat convertible with retractable soft top ; 3. 8L, V6, EFI, water-cooled, front-mounted engine ; rear wheel drive ; 4-wheel independent suspension.

Engines included a 2. 6 L I4 with 82 kW ( 110 hp / 112 PS ), a 3. 0 L V6 with EFI and 104 kW ( 139 hp / 141 PS ) and a turbocharged 2. 5 L OHV diesel I4 with 62 kW ( 83 hp / 84 PS ) or an intercooled 70 kW ( 94 hp / 95 PS ).

As of 2011, the BIOS is being replaced by the more complex Extensible Firmware Interface ( EFI ) in many new machines, but BIOS remains in widespread use.

However, the distinction between BIOS and EFI is rarely made in terminology by the average computer user, making BIOS a catch-all term for both systems.

ECMWF's Extreme Forecast Index ( EFI ) was developed as a tool to identify where the EPS forecast distribution differs substantially from that of the model climate.

Companies such as EFI and Xitron specialize in such RIP software.

EFI configuration is that of individual throttle bodies ( albeit throttle actuation is linked / synchronised ) and one injector per cylinder.

The Extensible Firmware Interface ( EFI ) specification states that PE is the standard executable format in EFI environments.

Also in 1986 Ford introduced EFI ( electronic fuel injection ) into the cars instead of the previous carbureted engines.

It achieves essentially the same functionality as the later EFI standard initiated at Intel, with lower overhead.

This was the first to be even-fire with split crankpins, and was the first of the second generation, and indeed EFI engine of any sort.

The most recent models use 32-bit Intel x86-686 or 64-bit Intel x86-64 processors, connected to an EFI.

Alpina offers a 4-stroke EFI engine equipped with a catalytic converter and state of the art dual oxygen-probe.

* Mazda E5T, 1. 5 L EFI 8V SOHC Turbo (' Turbo ' Japan models )

The 1. 6-litre engine was fitted as standard, with EFI optional ( standard on wagon ), with either 5-speed manual or 3-speed automatic transmission ( EFI automatic was 4-speed ).

EFI was standard, and automatic transmission was not available.

* Mazda E5T, 1. 5 L EFI 8V SOHC Turbo (' Cabriolet ' Japan models )

* Mazda B6, 1. 6 L EFI 8V SOHC ( option on ' GHIA ' models and standard on ' TX3 ' models )

* Mazda B6T, 1. 6 L EFI 16V DOHC Turbo (' TX3 Turbo ' and ' Turbo 4WD ' models )