About Concurrency

What is mean by concurrecy in thread level and program leve?
[67 byte] By [urrahina] at [2007-10-2 22:02:41]
# 1

concurrency is a property of systems which consist of computations that execute overlapped in time, and which may permit the sharing of common resources between those overlapped computations.

however not to mention that did you even google or research on your own? In case you did what is it that you don't comprehend or have questions about

kilyasa at 2007-7-14 1:19:10 > top of Java-index,Core,Core APIs...