Photo of office and other equipment circa the 1960's or 70's ?

1.  One photo with students using an oscilloscope or oscoloscope (circa the 1960's?).

2.  One photo of office equipment (circa the 1960's or 70's?).

3.  One photo by Lloyd Hoff dated 20 April 1967 of the inside of a piece of equipment.

4.  Two photos by Lloyd Hoff showing the interior of the language labs with cubicles and headphones (probably shot during the 1960's).