"Six years ago, Mark Spencer started his own Linux technical
support business. Unlike other tech startups at the time, he spent
his money frugally. Spencer had to; he didn't even have enough to
pay for an office PBX system, which can cost up to several
thousands of dollars.
"'I had about $4,000 to start it out with, and I wasn't about to
buy a phone system, so I figured I'd just make one,' Spencer
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