Abstract
This chapter focuses on the algorithms and data structures required to properly share information on the mass storage device with the most common PC operating systems (DOS, Windows, and some Linux distributions).. In other words it discusses a module for access to standard file system known commonly as FAT16. The File Allocation Table (FAT) is used for storing and organizing computer files and the data in order to access it. In a FAT16 file system, the FAT is essentially an array of 16-bit integers. Each element of the table represents one cluster. Certain unique values are used to mark reserved clusters and bad clusters. The role of the FAT is to keep track of how and where data are allocated. It does not contain any information about the nature of the file to which the data belonged. For that purpose there is another structure, called the root directory, whose sole purpose is to store filenames, sizes, dates, times, and a number of other attributes.
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