Traduccion 3
Operating Systems
What are operating systems? Can be answered at several levels.
Firstly, an operating system is a program, or a set of programs. Operating systems vary in size from very small to very large, but all are pieces of software. In the past, almost all operating systems were written in a low level language. Currently, many operating systems are partly or completely written in a high level language.
Secondly, an operating system is by virtue of its name, a system. It is...
Traduccion 2
Printers
The highest quality of printer available is the daisy wheel with flexible stems radiating from the center. The letters are well-defined and con be read clearly. The printer moves bi-directionally, printing both ways from left to right and then right to left. Remember that what is to be printed already exists in the memory of the computer and the daisy wheel does not have to type in sequence as would be expected from a human brain. The carriage therefore does not need to...