WiKipedia's definition of High Content Screening:

High Content Screening is a powerful new drug discovery method that uses living cells as the test tube for molecule discovery. "High Content Screening" describes the use of spatially resolved method to discover more in an individual experiment that one single experimental point. It is the combination of modern cell biology, with all its molecular tools, with automated high resolution microscopy and robotic handling. It different from most life science work because experiment evaluation is entirely automated.

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Genetix

Instrumentation, Imaging, Software,

IMSTAR		table of the available assays for High Content Screening on Pathfinder™ technology.
		Pathfinder™ technology is a fully automated line of systems allowing Image Cytometry for high throughput, high content screening
Purdue University HCS website		An aid in building up your support network in the area of HCS
BD Bioscience		BD Pathway™ 855 Bioimager: automated, confocal, real-time, single cell kinetic and endpoint imaging system
Cellomics		HCS instrumentation (both fixed end-  point and kinetic systems), image analysis modules, multi-parametric assays, validated reagents, multi- parametric assays, and informatics tools.
GE Healthcare		IN Cell Analysis System
Bioimage		Redistribution is a patented technology that monitors protein translocation within a cell
MAIA scientific		Platform technology for high information content screening.
Applied Biosystems		8200 Cellular Detection System