"Most systems" is kind of vague but I would say a minimum of 2GB with 4GB becoming fairly standard.
MHZ Megahertz
Gigabytes or "GB". For example, my computer has 4 GB of RAM. Older systems are usually measured in megabytes or "MB". 256MB was common for systems pre 2003.
multiparty
RAM is usually measured in GigaBytes or GB. The amount of RAM is usually quite high in the numbers already and quite a few computers are reaching the next level, TeraBytes or TB. There is usually only 1 TB if it is that high, though.
The basis of most WESTERN law systems is Common Law.
roman
command- line
Most operating systems are designed for either 32-bit or 64bit CPU's.
There are many recommended electronic brands that make good wireless home theater systems. An example of one of these brands would be Sony who make high quality products.
TCP/IP
Mostly (and most directly) by control of the signaling systems.
Most countries today operate under which of these economic systems