Robustness
In terms of computer software, refers to the resilience of the system when under stress - for example, when running a large number of processes, or when starved of memory or storage space, or when confronted with an application that has bugs or is behaving in an illegal fashion - such as trying to access memory or storage belonging to other tasks in a multitasking system.
Most modern computer designs have memory protection hardware allowing processes to be forcibly confined to their own memory space. In older designs, such as most 8-bit systems and many early 16-bit ones, this was not available, and thus system integrity was preserved mainly by clean design and careful coding. Thus the percieved robustness of a system became a major factor in debates about different machines and operating systems' quality and performance.
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