Funny, I've been building computers since the 1980s, and I always recall that chip that did the math being referred to as the CPU. I've never seen a computer case referred to as a CPU. If you could show me somewhere where they refer to the full computer case as a CPU, that would be great, I've just never seen it. 
TigerDirect calls them "Cases" versus the chips being called "CPUs (Processors)".
NewEgg calls them "Cases " versus the chips being called "Processors / CPUs".
I guess I've just missed ever hearing a full computer system referred to as a CPU...I've always called them "Computers" or "Servers" or "Workstations" or "Desktops" or "Laptops"...or for slang, yes, "Box" occasionally.

TigerDirect calls them "Cases" versus the chips being called "CPUs (Processors)".
NewEgg calls them "Cases " versus the chips being called "Processors / CPUs".
I guess I've just missed ever hearing a full computer system referred to as a CPU...I've always called them "Computers" or "Servers" or "Workstations" or "Desktops" or "Laptops"...or for slang, yes, "Box" occasionally.

Since the term "CPU" is generally defined as a software (computer program) execution device, the earliest devices that could rightly be called CPUs came with the advent of the stored-program computer.
...
The introduction of the microprocessor in the 1970s significantly affected the design and implementation of CPUs.
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Combined with the advent of the personal computer, this has led to the term "CPU" being applied almost exclusively to microprocessors in the past few decades.
...
The introduction of the microprocessor in the 1970s significantly affected the design and implementation of CPUs.
...
Combined with the advent of the personal computer, this has led to the term "CPU" being applied almost exclusively to microprocessors in the past few decades.

As far as San Fran, my point is that LL is very geographically close to Silicon Valley, heart of the U.S. high-tech industry; if you read my original reply to Lewis Nerd, I make that fairly obvious. 
