[mbesto]

> 4 out of 5 of the largest companies on earth are tech firms

Tech isn't really an industry...

Amazon = Retail (and probably another 10-20% software and software services)

Google = Advertising (and probably another 10-20% non advertising)

Facebook = Advertising

Microsoft = Software / Services (but very diversified)

Also, companies like Bechtel and Saudi Aramco are not publicly traded but could be considered in the "largest" category. We just don't know what their market cap is because they're private.

[adrr]

These firms probably have software engineering as a core competency. I think any firm going forward that doesn't have software engineering as a core competency will get eaten by a "tech" company who does.