A floating-point coprocessor from Intel for use with the 8086/8088 and 80186/80188 microprocessors. Available in speeds from 5 MHz to 10 MHz, the 8087 offers instructions, not found in the 8086/8088 instruction sets, for performing arithmetic, trigonometric, exponential, and logarithmic operations on 16-, 32-, and 64-bit integers; 32-, 64-, and 80-bit floating-point numbers; and 18-digit BCD (binary-coded decimal) operands. With application software that takes advantage of these instructions, the 8087 can dramatically improve system performance. The 8087 conforms to the proposed IEEE 754 standard for binary floating-point arithmetic. See also 8086, 8088, floating-point processor.