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see political action committeepolitical action committee
(PAC), U.S. organization formed by a corporation, labor union, or association to raise money for political activity. Funds can be gathered by voluntary contributions from members, employees, or shareholders.
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(1) See perceptual audio coding.

(2) (Programmable Automation Controller) A programmable microprocessor-based device that is used for discrete manufacturing, process control and remote monitoring applications. Designed for use in rugged, industrial environments, PACs combine the functions of a programmable logic controller (PLC) with the greater flexibility of a PC. They are also more easily set up for data collection and integration with the company's business applications than PLCs.

Although each PAC vendor uses its own development environment (IDE) and programming language, PAC networking is typically based on IP and Ethernet. Taking advantage of off-the-shelf microprocessors, PACs were developed in the 1990s to provide a single industrial controller that would provide the functions of a DCS and PLC. The term was coined in 2001 by the ARC Advisory Group ( Contrast with PLC and DCS.

PACs in Operation
The large white boxes are Opto 22 SNAP PACs in Chevron's Richmond, Virginia research facility. Processing the PID loops, the wires come from thermocouples that sense pipe temperature in a laboratory test that analyzes the best way to break down crude oil. The PACs determine when to raise and lower temperatures, and the three modules with the black sockets send digital signals to the heaters (cables not connected in this image). (Image courtesy of Opto 22,
References in periodicals archive ?
The PAC solicitation process has becomeroutinized and mechanized.
After sending more than 20 mailings, they have created a hefty file of names: 17,000 for the Central America PAC and 33,000 for the arms control PAC.
Other top takers of Superfund-related PAC contributions in the House include: Alaska congressman Don Young (LCV, 0), who, when asked what he thinks of when he sees a tree, replied, "I see paper to blow your nose," $36,300 (see sidebar); House Majority Leader Dick Armey of Texas (LCV, 0), who consistently pushes anti-environmental legislation to the fore, $54,000; and Ohio Republican Michael Oxley (LCV, 0), who authored a Superfund bill that might well have been ghost-written by the polluters themselves, $75,900.
Thousands of subcontractors and their supplier&-benefit from B-2 production, and they have inundated pliable legislators with individual campaign contributions in addition to PAC money.
Critics say that eliminating PACs would only make candidates more dependent on wealthy contributors.
Table 51: European 15-Year Perspective for PACS by Product Segment - Percentage Breakdown of Dollar Sales for Software, Hardware and Services Markets for 2003, 2009 and 2015 (includes corresponding Graph/Chart) III-97
Despite the rising acceptance of cardiology PACS, the funds, which are required to invest in cardiology PACS infrastructure are likely to become a hindrance to the adoption of PACS systems.
The company's Unity RIS and PACS systems integrate numerous tools to improve financial performance and productivity, including: Web-based scheduling, image, report and audio clip distribution; patented, automated hanging protocols for radiologists; and the report format preferences of individual referring physicians.
Earlier this year, KLAS recognized DR Systems as the leading PACS vendor in its PACS-Acute Care 2006 Report.
Currently, with the installation of radiology information systems (RIS) on parallel tracks with PACS, the technical profile of generic PACS is becoming increasingly complex.
Currently, with the installation of radiology information systems (RIS) being on parallel tracks with PACS, the technical profile of generic PACS is becoming increasingly complex.
com/reports/c46119) has announced the addition of "Australian PACS market" to their offering.