ELI5: Explain Like I'm 5

Concurrency (computer science)

Concurrency is about computers doing more than one thing at a time. It's like there are multiple people all trying to do their work at the same time, but there's only one computer. The computer has to be able to juggle all these different tasks and make sure they all get done. It's like a juggling act. The computer is the juggler and the tasks are the balls it's juggling.