This method uses query dependent importance scores and a probabilistic approach to improve upon PageRank. It pre-computes importance scores offline for every possible text query.

Grouper partitioned the results into clusters, or groupings of URLs which contain similar content.

Henry M. Levy; Digital Press, 1984, ISBN 0932376223. Thorough survey and description of early capability and object based hardware and software systems. Out of print, available as free download, PDF format.

Not Another Completely Heuristic Operating System: teaching OS coded in C++ subset, developed at UC Berkeley for OS and Systems Programming classes; now used worldwide. Descriptions, FAQ, port and bug lists, assignments, downloads. [Open Source]

Dynamically extensible, Exokernel-based, provides many core services: scheduler, kernel threads, domains, event dispatcher, security mechanisms, primitive VM operations. Blurs distinction between kernels and applications, which traditionally live in u...

Dynamically extensible, Exokernel-based, provides many core services: scheduler, kernel threads, domains, event dispatcher, security mechanisms, primitive VM operations. Blurs distinction between kernels and applications, which traditionally live in u...

Exploring a new OS structure, tuned to the needs of complex applications (eg, CAD/CAM) where a number of cooperating programs manipulate a large shared persistent database of objects.

Unix-like command line interface for the Macintosh, modeled on csh.