Glossary of terms ================= .. glossary:: CIC Clock-induced charge. A type of shot noise caused by clocking behavior in CCDs, of more concern when electron-multiplying. Also known as "spurious charge". See Janesick's *Scientific Charge-coupled Devices*, 7.1.2. RON Read-out noise. Noise inherent in the process of converting photoelectrons in a pixel to digital counts. Independent of signal level dependent on ADC and amplifier electronics and temperature. See Howell's *Handbook of CCD Astronomy*, 3.4. shmim Shared-memory image. The unifying abstraction of CACAO inter-process communication, essentially a block of computer memory and a way to coordinate updates with other processes in the system. If a term is missing here, it's up to you to figure out what it means and :doc:`document it`!