Backward compatibility is a property of a system, product, or technology that allows for interoperability with an older legacy system, or with input designed for such a system, especially in telecommunications and computing.
In computing, the form factor is the specification of a motherboard – the dimensions, power supply type, location of mounting holes, number of ports on the back panel, etc.
DDR SDRAM is a double data rate synchronous dynamic random-access memory class of memory integrated circuits used in computers.
A DIMM or dual in-line memory module comprises a series of dynamic random-access memory integrated circuits.
Dynamic random-access memory (DRAM) is a type of random access semiconductor memory that stores each bit of data in a separate tiny capacitor within an integrated circuit.
The JEDEC Solid State Technology Association is an independent semiconductor engineering trade organization and standardization body.
PC133 is a computer memory standard defined by the JEDEC.
PC66 refers to internal removable computer memory standard defined by the JEDEC.
Random-access memory (RAM) is a form of computer data storage that stores data and machine code currently being used.
A SO-DIMM, SODIMM, or small outline dual in-line memory module, is a type of computer memory built using integrated circuits.
Synchronous dynamic random-access memory (SDRAM) is any dynamic random-access memory (DRAM) where the operation of its external pin interface is coordinated by an externally supplied clock signal.