After Years in the BSDs, TTY Keyboard Status Request Feature Proposed for Linux

And the BSDs took it from VMS where ^T dumps a nice little bit of text that shows your CPU usage and memory usage, like such:<p><pre><code> $ NODE1::NIKKI 19:56:12 (DCL) CPU=00:00:00.01 PF=611 IO=91 MEM=453 $</code></pre>