Different Types of Memories

Am a US based web designer... I would like to learn more about web design/graphic design Servies and anything related.... Here i am sharing with you, some of the web-related details.
SIMM (single in-line memory module): A SIMM (single in-line memory module) is a module containing one or several random access memory (RAM) chips on a small circuit board with PINs that connect to the computer motherboard.
Since the more RAM Web Design Services computer has, the less frequently it will need to access your secondary storage (for example, hard disk or CD-ROM); PC owners sometimes expand RAM by installing additional SIMMs. SIMMs typically come with a 32 data bit (36 bits counting parity bits) path to the computer that requires a 72-pin connector. SIMMs usually come in memory chip multiples of four megabytes.
The memory chips on a SIMM are typically dynamic RAM (DRAM) chips. An improved form of RAM called Synchronous DRAM (SDRAM) can also be used. Since SDRAM provides a 64 data bit path, it requires at least two SIMMs or a dual in-line memory module (DIMM).

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Thank you for this.
A great review and would be such help for those who are having some
reviews on the basics about the computer.
Cheers!!
Keep them coming.