The Careers TOS says Stack Exchange Internet Services Inc., isn't the official name of the company Stack Exchange Inc.?
The official legal name of the company is "Stack Exchange Inc."
When we were originally just Stack Overflow, there was already a company called Stack Overflow Inc, so we had to call the company "Stack Overflow Internet Services Inc."
When we changed our name to Stack Exchange, we could become, simply, Stack Exchange Inc. The Careers reference was simply mistranslated from the original, longer name. The oversight is being corrected now. Thanks.
The company used to be called "Stack Overflow Internet Services" and was renamed to just "Stack Exchange" in 2011.
The "Stack Exchange Internet Services Inc." looks like the result of an incomplete search & replace.