UNIX for Dummies Questions & Answers

Please, if somebody can help me to understand the results of unixbench.

I have read some information about benchmarking but i cant find a explanation about these results.

Dhrystone 2 using register variables
Double-Precision Whetstone
System Call Overhead
Pipe Throughput
Pipe-based Context Switching
Process Creation
Execl Throughput
File Read 1024 bufsize 2000 maxblocks
File Write 1024 bufsize 2000 maxblocks
File Copy 1024 bufsize 2000 maxblocks
File Read 256 bufsize 500 maxblocks
File Write 256 bufsize 500 maxblocks
File Copy 256 bufsize 500 maxblocks
File Read 4096 bufsize 8000 maxblocks
File Write 4096 bufsize 8000 maxblocks
File Copy 4096 bufsize 8000 maxblocks
Shell Scripts (1 concurrent)
Shell Scripts (8 concurrent)
Shell Scripts (16 concurrent)
Arithmetic Test (type = short)
Arithmetic Test (type = int)
Arithmetic Test (type = long)
Arithmetic Test (type = float)
Arithmetic Test (type = double)
Arithoh
C Compiler Throughput
Dc: sqrt(2) to 99 decimal places
Recursion Test--Tower of Hanoi
select()

-- what this lines does?
-- what that means?


THANKS!!!