scope:

This standard applies to storage oscilloscopes with devices incorportated in the cathode-ray tube permitting the recording of a signal in another way than by the ability of the screen coating to ensure persistence of the display of information. This standard does not apply to oscilloscopes with a normal tube and storage devices external to the tube. However, some clauses of the standard may be applied with agreement between the manufacturer and the user. Thisstandard does not apply to oscilloscopes which have a cathode-ray tube having a screen with long persistance which temporarily retains the display. Certain types of storage oscilloscopes are capable of operation without storage. In this standard, it is assumed that the oscilloscope is operated, unless otherwise stated, as a storage oscilloscope.