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Racal-Vadic has announced the 2400VP, a full-duplex modem that provides MNP error control, ATPlus compatibility , speed conversion, an automatic voice-to-data switching circuit , front panel control, and nonvolatile memory for a price of $595. The 2400VP is compatible with the Hayes AT dialing protocol. The ATPlus command set expands the existing Hayes commands and allows the modem to display S# register values, control MNP error checking, and control speed conversion , among others. Touchbase Systems has announced the WorldLink 1200 portable modem. According to the company, the Hayes-compatible, battery-powered modem was designed for use with both portable and desktop computers. It provides a direct interface for acoustic cup operation at both 300 and 1200 bps. Features include autodial, auto-answer, pulse and tone dialing, and either a male or female DB-25 connector. Four LEDs provide visual status of call progress, carrier detect, high/low speed, and low battery condition. The modem supports Bell 103/212A standards and CCITT V.21 (300 bps) and V.22 (1200 bps) standards. The Bell and CCITT standards are switch and software selectable. The WorldLink 1200 retails for $199. OEM versions with flexible configurations are available. Expert Systems and Knowledge Engineering. Editor T. Bernold has brought together 19 Al application case studies that help bridge the gap between technical knowledge and managerial and organizational questions regarding applicability and the introduction of these systems. Prolog Programming for Artificial Intelligence. Ivan Bratko introduces Prolog as a practical programming tool and shows how Prolog programs are developed. Its use in problem solving and heuristic search, expert systems, game playing, and pattern-directed systems underlines Prolog's relevance in Al programming. Essential Lisp. This 352-page book leads readers through LISP and its applications to Al. also provide hands-on exercises for each of the topics covered. growth of the GaAs IC market will be considerably slower than previously expected. A major portion of the report is devoted to the review of the major merchant and captive industry participants, with emphasis on their production capabilities, R&D efforts, products, product strategies, and corporate profiles .mation Centers, 10th ed. Descriptive guide featuring over 18,000 libraries, archives , and similar facilities maintained by business firms, nonprofit organizations , educational institutions, government agencies, and others. Information about subject interests, materials held, journal and newspaper subscriptions, computer-based services offered, network or consortia memberships, staff sizes, and publications is provided for each facility.