L1 cache
Also known as:
primary cache,
level 1 cache
|
Memory which resides directly on the microprocessor or CPU. It is called “level 1” because the data is one level away from the logical circuitry which processes commands. The purpose of the L1 cache is to get the currently executing instructions closer to the CPU so fetching is faster. L1 cache memory is usually extremely fast but small, as it has to fit on the microprocessor.
|
L2 cache
Also known as:
secondary cache,
level 2 cache
|
The level 2 cache is memory either on the CPU or on the motherboard between the CPU and system memory (often called RAM). “Level 2” means the data is two levels away from the CPU's core logic. When the CPU needs to fetch an instruction, it will first poll the L1 cache, and if not be found, it will continue by polling the L2 cache. L2 cache memory is larger but slower than L1 cache memory.
|
LCD
Also known as:
liquid-crystal display
|
LCD is a technology for creating display screens. The advantages of LCD screens are that they can be very thin, light, and have a relatively long life span. This makes them ideal for laptops, hand-held devices, etc. LCDs work by sandwiching a liquid-crystal substance between two sheets of polarizing material. The substance is reactive to electricity such that the orientation of the crystals can be controlled very accurately. Basically, the crystals can be turned to block light or let it pass through the screen at different points, to form an image.
|
LED
Also known as:
light-emitting diode
|
LEDs are typically used for indicator lights on computers, remote controls and just about any other electrical equipment. LEDs require very little energy to emit light, and can be operated for decades without replacement or repair.
|
Li-ion
Also known as:
lithium ion,
lithium ion battery
|
Li-ion is the type of the most common rechargeable battery. It is commonly used in laptops, mobile devices and other wireless devices. Li-ion is superior to older technologies like Ni-Cd (nickel-cadmium) and nickel-metal-hydride, in that they are higher capacity, smaller, lighter, and less polluting.
|