What does o/c stand for?

Oil on Canvas (VRA)

Open Cover (AD)

Organized Crime (AD)

Overcharge (AD)

Onset and Course (SAUS)

Operations and Checkout (SAUS)

Operations and Control (NAKS)

Onset and Course [Medicine] (AD)

Object Classification (NG)

Observer/Collector [Military technology] (DDF)

O'Clock (ROG)

Officer Cadet [British military] (DMA)

Old Charter [Business and trade]

On Completion (SAUS)

Open/Closed [Mouth] [Doll collecting]

Open Cover [Shipping]

Operations Critical (MCD)

Out of Charge [Customs]

Out-of-Country [Motor vehicle violation code used in state of Maryland] (MVRD)

Overcharge

Overcharging (SAUS)

Over-the-Counter [Also, OTC] [Stock exchange term]

Oxygen-to-Carbon Atomic Ratio

Onset and Course [of a disease] [Medicine]

Operation and Checkout [NASA]

Oxford and Cambridge Schools Examination Board [British] (DCTA)