Presents new methods for compressing bit matrices in large information retrieval systems which exploit possible correlations between rows of words and columns of documents. Three encoding methods are tested and compared--Shannon-Fano, arithmetic, and Huffman--and an appendix discusses binomial coefficients. (20 references) (LRW)

Explores the effects of task characteristics and structural characteristics on aspects of information processing based on a survey of employees in the Australian telecommunications industry. Relevant research is reviewed; the analysis of results is explained; and implications for organizations are suggested. (Contains 42 references.) (LRW)