 This "partial fulfillment" aspect is what differentiates IOC orders from all or none (AON) and fill or kill (FOK) orders, but the terms might be used interchangeably in some markets.It is considered a "clean, quick, and easy way to acquire securities or goods [that] can save time and money" and the "chances of receiving at least a portion of the order within the time frame required is very good".IOC orders are generally employed when ordering "large quantities of stock".