Tektronix, Power Supply, models:

620-0295-00	Service Manual
CPS250	User Manual
KEITHLEY 2200 Series	Programming Reference Manual
Keithley 2231A-30-3	Performance Verification Manual
Keithley 2260B Series	User Manual
Keithley 2268 Series	Reference Manual
Keithley 2281 Series	Reference Manual
PS 501	Instruction Manual
PS 5010	Instruction Manual
PS 503A	Instruction Manual
PS 503S	Instruction Manual
PWS2185	User Manual
PWS4000 Series	Datasheet
PWS4205	Programmer'S Manual