Symbol 5188 from IEC 60417 - Title/Meaning: Student; operator Function/description: To identify the controls related to the functions of a student or of an operator.
Additional information: 
Application, for example, in language laboratories: teacher calls student
Published in: Supplement F, 1982
Own work using: iso.org/obp/graphics/grs/32ca33bd-8a56-4a9c-882b-eaff6e31ae58 200.png
Vectorization:  Mrmw