Accumulator
Accumulator may refer to:
 Accumulator (bet), a parlay bet
 Accumulator (computing), in a CPU, a processor register for storing intermediate results
 Accumulator (computer vision), discrete cell structure to count votes, standard component of the Hough transform
 Accumulator (cryptography), a value, determined by a set of values, that allows one to verify if any one of the original values is a member of the set
 Accumulator (energy), an apparatus for storing energy or power
 Capacitor, in electrical engineering, also known by the obsolete term accumulator
 Electrochemical cell, a cell that stores electrical energy, typically used in rechargeable batteries
 Hydraulic accumulator, an energy storage device using hydraulic fluid under pressure
 Thermal accumulator, a device or system that provides thermal energy storage as from concentrated solar power and storage heaters or heat banks in buildings 
 Accumulator (structured product), a financial contract used by clients (usually individuals) to accumulate stock positions over time
 Accumulator 1, a Czech film
 Dynamic accumulator, a plant that mines nutrients from the soil through its roots