http://www.macnn.com/articles/02/06/10/perfboard:.system/
Perfboard: system readout utility
updated 03:15 pm EDT, Mon June 10, 2002
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Perfboard 2.0 provides an extensive readout of system performance data for Mac OS X. Areas monitored include CPU load metrics, memory statistics, network bandwidth, and disk I/O operations. Changes in the update are a new vertical window orientation and bug fixes.
