Kamp (1981) developed a version of logic with explicit context to map sentences from natural language in a way that would preserve their context structure.
Cheng and Holyoak (1985) presented pragmatic schemas of reasoning that are induced from experience and evoked by the context.
Growth in interest measured by Web pages:
Many activities are context sensitive :
reasooning, interpretation, prediction, focusing attention, etc.
Increasing interest in context by:
Philosophers
Application Developers