Final answer:
Batch systems use resources as a batch or group, while real-time systems use resources as they become available or are needed.
Step-by-step explanation:
Resource use is one characteristic used to distinguish between batch and real-time systems.
In batch systems, resources are typically used as a batch or group. This means that the system collects a set of input data, processes it, and then produces an output. The resources needed for the entire batch are allocated and released at once.
In contrast, real-time systems use resources as they become available or are needed. This means that resources are allocated and released in real-time, as the system processes the input data and produces the output.