Palomar high-redshift quasar surveys

I use the name Palomar high-redshift quasar surveys for a series of surveys outlined in a series of 1980s-1990s papers with titles beginning "Spectroscopic CCD Surveys for Quasars at Large Redshift". The surveys were to find such quasars using the Hale Telescope with at-the-time leading-edge technology, e.g., incorporating CCDs. Various instrument combinations were used for the individual surveys. The surveys shared the designator prefix, PC. (Explanations of the abbreviation PC are rare and inconsistent: I've seen Palomar confirmed and Palomar calibrated.) Survey names as per the published paper titles:

• A deep PFUEI survey.
• A PFUEI transit survey.
• The Palomar transit grism survey (PTGS).
• The Palomar Scan Grism Survey (PSGS).

PFUEI (for "Prime Focus Universal Extragalactic Instrument") was a Hale telescope instrument at the time. The phrase "transit survey" was used differently than what is now a common usage: currently the phrase is often used for a search for extra-solar planet transits, but in this earlier case, transit was used to mean a source passing through the field of view (i.e., like a drift scan), a method used to discover quasar candidates.