In years past, many people were not that familiar in using a computer, and as years have passed many people are now computer experts and even elementary school students is often familiar with the commands and functions of a computer. Basically, computers can do a variety of different tasks, it is just a matter of how the computer is programmed and what kind of software is installed in a computer to complete tasks.
In an office where documents are very important, they usually use text editing and input software to create these documents. In an accounting department the most used software are the kinds that have the ability to organize and present financial reports of the company.
If you are working in a telecommunication company there are types of software that are use to monitor cellular sites, antennas, base stations and other stations that are used to manage communication services which are provided to the public. But of course working on these computers requires knowledge on the software installed on the computer. The function of these computers can control the function of a station that is miles away from the control center. This is how technology works; many have benefited by these technologies and they undoubtedly contribute to the convenience to our lives.
The computer has arguably been the best thing humanity has created and now many people rely on computer's functioning to make things a lot easier. But of course a computer only will act according to the command with which it is instructed and these commands are integrated in software to make it easy to use. Unlike before, one should be familiar with different syntax and command in order to accomplish certain tasks, but today there are user interfaces which are made to be user friendly where commands can be made with the use of the mouse. Most of the software made today uses graphical user interfaces to ease the use of difficult computer programs.