Email is one of the earliest forms of digital communication and is still used today. It allows users to send messages and files between computers asynchronously - meaninging the sender and receiver don't need to be online at the same time.
Instant Messaging (IM)
Instant messaging is different from email as it is synchronous. This means that the receiver is able to reply immediately to any messages sent. So, sending a message through Whatsapp or Messages
Remote Work
More recently, computing has opened the possibility of remote work through video conferencing. This shift was espcially prominent during the COVID pandemic, when the global lockdown forced employers to find new ways for workers to communicate from home.