Total Hours Computer Has Been On

I would like to know the total hours my computer has been on.
I know there are commands to give uptime since power on but I remember a tool or utility that could report the cumulative hours the computer has been on (this was back in MacPlus days).
Anyone know a command, tool or utility that reports this?

Hi Rudy,
I went through
b System Profiler.app
looking for a total hours used entry, and no luck.
best of luck, ...ben
PS. I did come across a
b Battery Cycle Count
which was cool given the interest in the life of lithium batteries used in laptops and iPods, but no information on what constitutes a 'cycle'

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Total Hours Computer Has Been On

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