But DON'T try turning that off and back on again

This big-city college instructor pilot fish teaches networking, and he likes to stay up to date on real-world data center operations and equipment -- not just what's in the textbooks.

"I am occasionally afforded equipment tours of local college facilities," fish says.

"A major upgrade to a medical center associated with this college was quite entertaining. Seeing the IBM Z9-U03 mainframe standing in all its glory left me in awe.

"The specs were: 772 MIPS, running ADT/Census, Web Services, Accounts Receivable, Appointment Scheduling, General Ledger, HSM Hierarchical Storage Management.

"I was also amused to see the exact same red on/off switch that was shipped on the first IBM PC in 1981..."

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