Been diving into some fascinating market history lately, and stumbled on something that really puts things in perspective. When you think about the oldest tech companies still around, most people picture recent startups. But the reality? Some of the biggest names in technology have been around for over a century.

Let me walk you through this. GE started in 1892 when Edison's company merged with Thomson-Houston. Electric light was basically the iPhone of its era - absolutely revolutionary. They went public on the NYSE that same year and completely transformed how we live.

Then there's AT&T, which traces back to Alexander Graham Bell's telephone invention in 1877. The company went public in 1901 and honestly, the innovations that came out of it are insane. We're talking air-to-ground radio, sound in movies, broadband coaxial cable - these weren't just incremental improvements, they reshaped entire industries.

IBM's another one. Started as Computing-Tabulating-Recording Company in 1915 - not exactly a catchy name, right? They made punch clocks and tabulating machines before pivoting to computers. Listed on NYSE in 1915 and eventually became what we know today.

Xerox is interesting because it didn't even go public under that name. Started as Haloid Company in 1936, went public in '36, but didn't hit the NYSE until 1961 when they rebranded to Xerox. Copy machines became synonymous with the company.

Texas Instruments rounded out this group of oldest tech companies when they listed in 1953. They created the first electronic handheld calculator - another one of those 'obvious now but mind-blowing then' innovations.

What strikes me about all these oldest tech companies is that they weren't just successful because they got lucky. They fundamentally changed how technology worked and how people interacted with it. Electric light, telecommunications, information processing, copying technology, semiconductors - each one solved a real problem that nobody else was solving at scale.

The interesting pattern here? These oldest tech companies all had something in common: they solved problems people didn't even know they had yet. That's kind of the golden rule for tech success, honestly. Makes you wonder which current companies will still be around in a hundred years.