The amount of compression depends on the compression program used, the compression method, and the type of source file. Best of all are compressed files of graphic images, text files, data files, the compression ratio of which can reach 5 – 40%, files of executable programs and load modules are compressed less – 60 – 90%. Archive files are hardly compressed.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.