| Different forms of storage are available, each with advantage and disadvantages. 
        Following is a summary of the low cost storage options for instrumentation: 
         
          | RAM | Available in different forms. Generally needs a parallel interface 
              to the micro (more complex circuit). Also tends to need power backup 
              for when the instrument batteries or mains power are removed. Useful 
              for the storage of relatively large amounts of data or where the 
              storage needs to be carried out at high speed (>10ms). |   
          | EEPROM | Particularly useful in I2C format, giving a serial interface 
            and simplifying the circuit, thus improving reliability and reducing 
            cost. Needs no battery backup as storage is non-volatile. Useful for 
            storing smaller amounts of data (<1 Mbit) and where the rate of 
            storage is less than 10ms. |  For information on other forms of data storage (flash, miniature disk 
        drives, etc.) then please contact Client Software directly. There are 
        many possibilities but they are still usually out of the realms of the 
        low cost instrument manufacturer. This may not be the true in your case 
        of course! |