the calculators come with a main program memory (ram) of 146 kilobytes and a storage flash memory of 768 kilobytes. it was the first time that casio adopted a flash storage into its calculator production. the program memory is used to store program files, calculator settings, and variables for matrices, statistics, graphs, tables, equations, and etc. the storage memory is used to stored add-in applications, which can be loaded through a computer. memory usage with listed categories can be viewed from a system manager menu.