PsList

Most UNIX operating systems ship with a command-line tool called "ps" (or something equivalent) that administrators use to view detailed information about process CPU and memory usage. Windows NT/2K comes with no such tool natively, but you can obtain similar tools with the Windows NT Workstation or Server Resource Kits.
The tools in the Resource Kits, pstat and pmon, show you different types of information, and will only display data regarding the processes on the system on which you run the tools.
The PsList application was developed to be a tool which shows you a combination of the information obtainable individually with pmon and pstat. You can view process CPU and memory information, or thread statistics. What makes PsList more powerful than the Resource Kit tools is that you can view process and thread statistics on a remote computer.
The default behavior of PsList is to show CPU-oriented information for all the processes that are currently running on the local system. The information listed for each process includes the time the process has executed, the amount of time the process has executed in kernel and user modes, and the amount of physical memory that the OS has assigned the process. Command-line switches allow you to view memory-oriented process information, thread statistics, or all three types of data.
Usage:
pslist [-?] [-d] [-m] [-x][-t][-s [n] [-r n]][\computer [-u username] [-p password]] [name | pid]

pslist exp would show statistics for all the processes that start with "exp", which would include Explorer.
-d Show thread detail.
-m Show memory detail.
-x Show processes, memory information and threads.
-t Show process tree.
-s [n] Run in task-manager mode, for optional seconds specified. Press Escape to abort.
-r n Task-manager mode refresh rate in seconds (default is 1).
\\computer Instead of showing process information for the local system, PsList will show information for the NT/Win2K system specified. Include the -u switch with a username and password to login to the remote system if your security credentials do not permit you to obtain performance counter information from the remote system.
-u username If you want to kill a process on a remote system and the account you are executing in does not have administrative privileges on the remote system then you must login as an administrator using this command-line option. If you do not include the password with the -p option then PsList will prompt you for the password without echoing your input to the display.
-p password This option lets you specify the login password on the command line so that you can use PsList from batch files. If you specify an account name and omit the -p option PsList prompts you interactively for a password.
name Show information about processes that begin with the name specified.
-e Exact match the process name.
pid Instead of listing all the running processes in the system, this parameter narrows PsLists scan to tthe process that has the specified PID. Thus:
pslist 53
would dump statistics for the process with the PID 53.