who's oldest unix or cp/m? and who's fastest in data transfer cash or ram or flash?

Answer 1

UNIX, by quite a while. It was developed in the 60's , CP/M came along somewhere in the 70's. The difference is CP/M is a single user operating system, for personal computers, before DOS was adopted. UNIX is a multiuser network server system, in other words, it can drive dumb terminals(no harddrive, no operating system), which use the programs resident on the UNIX server.
As far as data transfer, cache is the fastest, because it's suppose to be. The purpose of cache is to keep data that is expected to be used again in memory. When your shopping for a new computer, to get the most speed, look for the CPU that has the most cache. 256MB is pretty common.
RAM is the second place the CPU will look for data not in the cache. The program may need to recompile or recalculate the data it gets from RAM. This has already been done in cache so you get a little speed there. In reality, whe're talking nanoseconds of difference here for the most part.
As far as flash, to the best of my knowledge, this is actually a software routine that is designed to change eprom values, such as flashing your BIOS with an update. Flash is also the name of a highly specialized graphics building software.

Answer 2

I believe cp/m is older. I used to work on a state-of-the-art word-processor system in the early 80s that ran off of cp/m.