These are keyboard shortcuts for doing word processing or any kind of transferring of text, graphics, or elements in the computer world.
Whenever I’m “training” folks on how to interact with computers, I like to help establish a pattern or practice that transcends a particular program or application. For instance, you can access cut, copy and paste via the right-click of the mouse in certain programs, while that same right-click might produce different results in another program. Using the keyboard shortcuts highlighted above are almost universal.
There, you have been trained!