Answer:In the context of numerical representation, "longs" and "units" can refer to different concepts depending on the system or context. However, if you are referring to a common numeric system:- **Longs** often refer to the concept of a large number or quantity, though this term isn't standard in most numeric systems.- Units generally represent individual counts or single items in a quantity.If you mean the term "long" in computing, it might refer to a data type, such as a "long integer," which is a larger integer type capable of representing larger numbers than standard integers.If you are referring to a specific context or system, providing more details would help in giving a precise explanation.