Mass IT outage: here's a list of companies and operations affected

• A huge global IT outage is disrupting flights, banks, retailers, and media outlets.
• The widespread disruptions have been linked to an issue with the cybersecurity firm CrowdStrike.
• Operations affected include airlines in the US and Europe, supermarkets, and some 911 lines.

A mass IT outage has hit flights, banks, retailers, and media outlets around the world.

The issues appear to be linked to the cybersecurity firm CrowdStrike.