The "Linen Card Era" of Post Cards was from 1930 to 1945.  Most World War II Post Cards were printed on this linen type paper stock. Soldiers would send these mementos home as proof of "being there" in the case of attending one of the camps or forts depicted in the cards.  They were an inexpensive (if not free) way to correspond with loved ones or friends back home or around the world.

RADAR MECHANIC, IFF (862)

Test, adjusts, maintains and performs second-echelon repair on IFF equipments such as SCR-515, 595, 695 and Radar Sets AN/APS-13 and SCR-729.

SURGICAL TECHNICIAN (861)

Performs a variety of nonprofessional surgical and medical duties in rendering surgical care and treatment to patients.

RADAR MECHANIC (GEE) (860)

Performs first and second echelon maintenance and repair on radio equipment Gee, Mark II and similar devices.

PHARMACY TECHNICIAN (859)
Veterinary Pharmacy Technician

Compounds and dispenses medicines and prepares stock solutions and powders according to specifications.

MEDICAL LABORATORY TECHNICIAN (858)

Conducts microscopic and chemical tests and analyses at a medical laboratory to determine presence of germs and chemical composition of body fluids, and to prepare cultures, vaccines, and serums.

RADAR MECHANIC, SEA SEARCH (LAB) (856)

Performs second echelon maintenance and repair on radio sets and equipment SCR—717, SCR—729, SCR-595/695 RC-217, and similar devices.

DENTAL TECHNICIAN (855)

Assists Dental Officer in rendering routine dental service. Prepares patients for dental work. Sterilizes and lays out instruments and medical supplies.

RADAR MECHANIC, SEA SEARCH (854)

Performs second echclon maintenance and repair on radio sets and equipment SCR—717, SCR—729, SCR—595/695 and similar devices.

RADAR MECHANIC, NAVIGATION (853)

Performs second echelon maintenance and repair on radio sets and equipment SCR-622/722, RC—24, SCR-518, SCR-718, and similar devices.