(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.)

Initialism of regular and frequent.

Alternative spelling of R & B

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

Initialism of Digital Versatile Disc recordable: a form of digital media that is similar to a CD, but has far denser storage and thus greater capacity. It can only be written to once, but it can be read from an indefinite number of times.

(medicine) Initialism of rule out: used to indicate that a certain possible diagnosis should be considered, and appropriate tests performed to rule it out.

(as a closing in a message) Initialism of very respectfully.

Initialism of kidnap and ransom.

Initialism of reserves-to-production.

Alternative form of three Rs