This document reviews a single precision floating point arithmetic unit that performs operations like addition, subtraction, and multiplication on 32-bit operands according to the IEEE 754 standard. It discusses how floating point units are widely used in areas like scientific computing and signal processing. The review covers the IEEE 754 standard specification for single precision floating point numbers, which uses 1 sign bit, 8 exponent bits, and 23 fraction bits. It also summarizes several previous studies that have designed and optimized reversible floating point arithmetic units to reduce costs like quantum cost, garbage outputs, and constant inputs.