Explanation needed for SP_WHO2 results

I need a explanation of all the fields in sp_who2
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Spid—The system process ID.
status—The status of the process (e.g., RUNNABLE, SLEEPING).
loginame—Login name of the user.
hostname—Machine name of the user.
blk—If the process is getting blocked, this value is the SPID of the blocking process.
dbname—Name of database the process is using.
Cmd—The command currently being executed (e.g., SELECT, INSERT)
CPUTime—Total CPU time the process has taken.
DiskIO—Total amount of disk reads for the process.
LastBatch—Last time a client called a procedure or executed a query.
ProgramName—Application that has initiated the connection (e.g., Visual Basic, MS SQL Query Analyzer)

from http://www.devx.com/tips/Tip/14208

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DavidKanAuthor Commented:
Can you also explain what the different status's mean
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Microsoft SQL Server 2005

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