Why does the electronics industry use the adjective "organic" when it adds no information?
Organic means something very, very specific from an industrial point of view. "Organic fruit and vegetables" has perverted the term as fruit &amp; veg are definitely organic (as in carbon-based) but in this context it describes the lack of use of organic compounds (pesticides etc..) and a more "natural" process. Likewise "organic" can be used as an adverb to describe how something looks.

Organic Chemistry

https://en.wikipedia.org/wiki/Organic_chemistry


  Organic chemistry is a chemistry subdiscipline involving the
  scientific study of the structure, properties, and reactions of
  organic compounds and organic materials, i.e., matter in its various
  forms that contain carbon atoms.


The examples you have given and the vast majority of cases where the electronics industry uses ORGANIC is correct. 

Organic Solderability Preservate (surface finish)


  Organic Solderability Preservative, or OSP is a method for coating of
  printed circuit boards. It uses a water-based organic compound that
  selectively bonds to copper and protects the copper until soldering.


Organic Substrate (for circuit boards or flip-chip assemblies)

Polyimide and other such organic materials are used as PCB substrates

Organic Acid (O* flux types according to J-STD-0001, J-STD-0004)**

As opposed to inorganic acids like... Nitric acid (HNO3) Sulphuric acid (H2SO4) Hydrofluoric acid (HF)

Used to indicate amino acid structures are used. Organic compounds

OLED

Organic Light Emitting Diode's make use of a thin ORGANIC layer ( eg Poly(p-phenylene vinylene) ) to produce photons instead of purely inorganic structure of silicon and doping elements.

Organic isn't used because they are "individually tiny and therefore high resolution matrix at low cost".