This data is not an electronic record under Part 11 due to its "fleeting" nature. Such data may not be stored at all; e.g., it can be a direct signal from a detector to an A/D converter. Alternatively, it can be stored temporarily in a variety of manners. For example it can reside solely in a computer's RAM, or it can be stored to a computer's virtual memory, i.e., written to hard disk in temporary files that are automatically deleted by the end of the current computer session. Transient data is unalterable by the user while it remains in memory. Transient data may be sent to a printer, processed further by the system, or transmitted to another computer system. It may be used by the system without ever being stored; e.g., as input for a feedback loop in a control system, or it could ultimately become part of an electronic record.