Virtual Address Space(VAS):VAS is set of addresses that the threads of a process are allowed to use. When aprocess runs,the memory manager maps the VAS to the physical addresses where the data really exists. This mapping is the responsibilitiy of the opreating system,and prevents seperate processes from bumping into or overwriting the address space of other processes. Each process has its own VAS,as well as threads that also cannot be shared with another process. This garantees that each process has its own resources and does not need to depend on other processes for its resources.
