Meaning – The term resource, refers to any facility of a computing system or operating system required by a job or task, and including main storage, input/output devices, the processing unit, data sets, and control or processing programs.
A resource is any hardware or software that’s accessible by a computer, network, or another object connected to a computer. For example, a printer connected to a network is an example of a shared resource. Another example of a resource may be a network server farm or cluster that allows users to have access to multiple computers to perform complicated tasks.
Hardware resources are hardware device settings that allow it to communicate with the computer. The most common hardware resources are the DMA, I/O port, IRQ.
Example of usage – “A program may report low system resources, which indicates the computer is running low on available memory and it may be necessary to close other programs open on the computer.”