Tech stocks have taken a beating. Here's how longtime tech investors are deciding which tech firms are bargains that will weather the storm, and which companies are in trouble. (AAPL, AMZN, FB, GOOGL, NFLX, CRM, ZM, WORK)

· The broad market sell off in recent weeks has hit tech stock about as hard as the shares of other companies.
· Longtime investors and analysts say that's created some good opportunities to buy shares in some of the leading names in the sector.
· Many tech stock watchers like the shares of the biggest companies — Amazon,...