A FIFO memory device comprises a storage device which is a non-volatile FIFO comprising a plurality of non-volatile storage elements or latches. An array of optical focusing elements decomposes the sensor’s FOV into at least four sub-fields. These components work together to allow a safety net system to easily be folded against a building for repairs or in inclement weather conditions. Alternatively, a ferroelectric capacitor and a capacitor other than a ferroelectric capacitor is connected to the switching element. The particular set of entities may include a first set of entities of the program code function for which the identifier is within a lexical scope of the first set of entities and a second set of entities of the graphical model for which the program code function is within the graphical scope of the second set of entities. The method may include causing decryption of the encrypted file to obtain the original file, and providing, to the requestor, by the processor, access to the original file.