Before the advent of digital data collection technology, recording traces off an oscilloscope involved physically taking photographs of the oscilloscope screen. Consequently, many instrument manufacturers including Hewlett-Packard produced a variety of specialized cameras specifically for this purpose.

History of Polaroid Series:

Part 1:    • Polaroid Cameras Part 1: The Dawn of ...  
Part 2:    • Polaroid Cameras Part 2: The Colour Era  
Part 3:    • Polaroid Cameras Part 3: Integral Fil...  

0:00 Introduction
1:39 1960s Oscilloscope Camera Models - Overview
2:22 Model 195A (1960)
6:50 Model 196A (1961)
7:42 Model 197A (1965)
8:54 Model 198A (1969) - External Overview
10:54 Model 198A - Controls
12:37 Model 198A - Internal Components
15:33 Outro

SOURCES:

http://hparchive.com/Catalogs/HP_New_...

https://www.hpmemoryproject.org/an/pd...

https://www.hp.com/hpinfo/abouthp/his...

https://xdevs.com/doc/HP/pub/HP-Catal...

http://hparchive.com/Manuals/HP-196A-...

https://www.keysight.com/ca/en/assets...

https://citeseerx.ist.psu.edu/documen...