The use of manage files very much facilitates the creation of files and programmer can focus on other aspects of the programming lacking worrying on details which can be handled by the operative system. The simple use of the handles consists in that to operate o a file, it is only essential to define the name of the same and the number of the handle
to use, all the rest of the information is internally handled by the DOS. When we use this method to work with files, there is no difference between sequential or random accesses; the file is just taken as a series of bytes. A function to use manages the functions used for the handling of files all the ways through handles are described in unit 6: Interruptions, in the section committed to the 21H interruption.