An accumulator is a register that is a part of a processor. It has more/faster instructions than other registers. Examples:
/360: no accumulator
8080: A
6800: A and B
8086: AX
80386: EAX
x86-64: RAX
The accumulator in an automatic transmission softens the shift between gears.
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ACCUMULATOR
In the 8085, if the accumulator starts as 00H, then adding 89H and 79H to it results in a value of 02H with CARRY set.
In the 8085, the LDA instruction loads the accumulator from memory, while the STA instruction stores the accumulator to memory. LDA is a read, while STA is a write. LDA is opcode 3AH, while STA is opcode 32H.
The Watt hour efficiency is the ratio of the amount of energy available during the discharge of an accumulator to the amount of energy put in during charge.
Not every relation is a function. But every function is a relation. Function is just a part of relation.