Compact disc - recordable; a form of digital media that is based on the use of a laser to read from and write to a plastic disc. It can only be written to once, although the entire disc does not necessarily have to be written in one session.

(business) Initialism of Research and Development (a department within a company (or governmental division) dedicated to that task, or the fiscal category that represents it in fiscal reporting.)

(slang, humorous) Ritalin, an amphetamine-like psychopharmaceutical, prescribed for ADHD.

Initialism of regular and frequent.

(organic chemistry) A crystalline sulfonic acid, HOC₁₀H₅(SO₃H)₂, derived from beta naphthol and used as a dye intermediate; 2-naphthol-3,6-disulfonic acid.

(physics, astronomy) The relatively rapid nucleosynthesis process, in supernovae, in which a large neutron flux allows rapid neutron capture and synthesis of elements up to the transuranic elements.

Alternative spelling of R & B

Abbreviation of rhythm and blues. / Ellipsis of contemporary R&B.

Initialism of resisting and obstructing

a Soviet rocket modelled on the V-2; the Scunner