Core International

Core International, formally CORE International Inc. and commonly known as Core, was a computer and technology company headquartered in Boca Raton, Florida. Hal Prewitt founded the company in 1979 as a technology business serving users of IBM's early business-oriented systems, especially the IBM 5100 series and IBM System/23. Its initial activities combined computer sales and programming with the assembly of microcomputers, peripheral integration, software distribution, maintenance, and business-system implementation. The company originally operated as a for-profit association for IBM 5100-series users. It supplied practical consumables such as printer ribbons, paper, diskettes, and tape cartridges, while also distributing pre-developed software. Its software range included mortgage calculators, word-processing tools, games, utilities, payroll and accounting programs, and applications tailored to particular industries. IBM sales representatives referred some 5100-series users to Core, giving the company an early channel into a specialized installed base. Core became more distinctive when it addressed limitations in IBM's storage and networking capabilities. In September 1982 it announced hard-disk storage and a local-area network for the IBM 5100 family. The systems offered capacities beginning at 10 megabytes and extending to 160 megabytes in fixed and removable configurations. Core-Net, integrated into the storage systems, connected as many as eight IBM 5100-series computers so that users could share storage and data. This gave owners of systems that had previously relied on tape or relatively small floppy-disk storage an expansion path and an early form of networked computing. As IBM withdrew the 5100 family from active marketing, Core worked on ways to protect customers' existing software investments. In 1983 it introduced PC51, a software environment that allowed programs written in the 5100 series' BASIC dialect to run on IBM PCs and compatible machines under MS-DOS. Core also introduced a LAN card that connected IBM PCs and compatibles to an IBM 5100-series network. The company thereby positioned itself between legacy IBM business systems and the rapidly expanding PC market. Core entered the personal-computer marketplace in the mid-1980s. PC51 helped it become an IBM value-added reseller, allowing the company to sell IBM PCs, Core peripherals, and integrated solutions as a package. IBM authorized and promoted the relationship. Core subsequently developed the ATplus family of hard-disk drives and expanded into storage, backup, and other PC products. The company also collaborated with Control Data Corporation on hard drives for the PC market, with the partnership announced in February 1985. The IBM PC AT's early hard-disk supply and reliability problems created an opportunity for Core. After identifying issues with the factory-installed drive, Core marketed alternative storage solutions during a period when competing products were difficult to obtain. It also created DiskP, later superseded by the DOS-based COREtest, to demonstrate comparative performance and identify substandard combinations of hard drives and controllers. COREtest was used by computer publications, hardware makers, distributors, dealers, and independent evaluators as a comparative testing tool, increasing Core's visibility beyond its direct product sales. Core remained privately held and solely owned by Prewitt until 1993, when it was acquired by Aiwa, described as a wholly owned subsidiary of Sony. The available reference material does not establish the company's subsequent operating status, product continuity, or the precise terms and financial value of the transaction. Core's documented significance lies in its role as an early specialist supporting IBM's 5100 family, bridging legacy business systems to IBM-compatible PCs, and commercializing storage, networking, software-compatibility, and performance-testing solutions during the formative years of the personal-computer industry.

Core International was established in 1979 by Hal Prewitt as a technology company serving users of IBM's early business computers. Its initial focus included selling and programming minicomputers, assembling microcomputers, integrating peripherals, maintaining systems, and implementing computer solutions for businesses. Core also organized a user-oriented supply and software operation around the IBM 5100 series and IBM System/23. Customers could obtain printer ribbons, paper, diskettes, tape cartridges, software, and maintenance support. The software catalog covered general office and business utilities as well as payroll, accounting, mortgage calculation, games, word processing, and industry-specific applications. The company developed its reputation by addressing limitations in IBM's 5100-series product line. In 1982, Core announced hard-disk drives and a local-area network for the IBM 5100 family. IBM's systems had offered limited storage options: the 5100 relied on tape, while the 5110 and 5120 were constrained by approximately 1.2-megabyte floppy disks. Core's storage products began at 10 megabytes and reached 160 megabytes, with both fixed and removable configurations. Core-Net, built into the storage systems, linked up to eight IBM 5100-series computers and allowed shared access to storage and data. This work provided customers with a way to expand older systems before comparable networking and storage options became broadly available for IBM PCs and compatibles. When IBM began withdrawing the 5100 family from the market, Core concentrated on migration and compatibility. In 1983 it introduced PC51, software that enabled programs written in the 5100-series BASIC environment to run without modification on IBM PCs and compatible computers using MS-DOS. Core also produced a LAN card that connected IBM PCs and compatibles to the company's IBM 5100-series network. The technology helped customers preserve existing software and data practices while adopting newer PC hardware. PC51 also gave Core a route into the wider personal-computer business. In the mid-1980s the company became an IBM value-added reseller, selling IBM PCs alongside Core storage, networking, software, and support products. IBM authorized and promoted the relationship. Core developed the ATplus family of hard-disk drives and expanded its offerings to include personal-computer products and backup solutions. It also formed a relationship with Control Data Corporation for the introduction of PC hard drives; that collaboration was announced in February 1985. Core benefited commercially from problems surrounding the IBM PC AT's early factory-installed hard disk. The company identified issues with the drive and offered alternatives while supply was restricted and the market had limited competition. It also responded to concerns that some dealers were installing inferior drives without clearly disclosing the substitution. DiskP, later replaced by the DOS-based COREtest, provided visual demonstrations and comparative measurements of hard-drive and controller performance. Computer publications, manufacturers, distributors, dealers, and independent evaluation organizations used the testing software, making COREtest a frequently referenced comparison tool in the contemporary computer market. Core stayed private and was solely owned by Prewitt until 1993. That year Aiwa acquired the company; Aiwa was described in the reference material as a wholly owned Sony subsidiary. The available sources do not provide sufficient information to document Core's post-acquisition management, product catalog, corporate dissolution, or continuing brand status. Consequently, its present status is recorded as unknown rather than definitively active or defunct. Historically, Core is documented as an early specialist in IBM-system support, storage expansion, networking, PC compatibility, backup, and computer performance evaluation.

• 1993

  Acquired by Aiwa

  [1]Core Internationalen.wikipedia.org

  Aiwa purchased Core after years of private ownership by Hal Prewitt.

• 1985

  Control Data hard-drive collaboration announced

  [1]Core Internationalen.wikipedia.org

  Core announced a collaboration with Control Data Corporation concerning hard drives for the PC marketplace.

• 1984

  Expansion into the IBM PC marketplace

  [1]Core Internationalen.wikipedia.org

  Core became an IBM value-added reseller and expanded its product and services business around IBM PCs and its own peripherals.

• 1983

  PC51 introduced

  [1]Core Internationalen.wikipedia.org

  PC51 enabled IBM 5100-series BASIC programs to run on IBM PCs and compatible systems under MS-DOS.

• 1982

  Core-Net and IBM 5100 hard-disk systems announced

  [1]Core Internationalen.wikipedia.org

  Core announced storage systems ranging from 10 to 160 megabytes and Core-Net networking for IBM 5100-series computers.

• 1979

  Core International founded

  [1]Core Internationalen.wikipedia.org

  Hal Prewitt established Core as a technology company providing computer products, software, maintenance, and business-system integration.

A specialist technology provider focused on extending the useful life of IBM business systems, supplying storage and networking upgrades, and helping customers transition from IBM 5100-series computers to IBM PCs and compatible systems.

• Local-area networking and storage · 1982

  Core-Net

  Core-Net was a networking capability integrated into Core storage systems for IBM 5100-series computers. It connected as many as eight systems, allowing them to share storage and data. The product addressed the limited storage and networking options available to users of the IBM 5100, 5110, and 5120.

• Operating-system and software compatibility · 1983

  PC51

  PC51 was an operating environment for IBM PCs and compatible computers running MS-DOS. It was designed to run IBM 5100-series BASIC programs without modification, enabling customers to move from older IBM business systems to newer PC hardware while preserving existing software investments.

• Hard-disk drives

  ATplus Series

  The ATplus Series was Core's family of hard-disk drives for the IBM PC and related personal-computer market. It followed Core's earlier work on storage for IBM 5100-series systems and was promoted during the supply and technical difficulties affecting early IBM PC AT hard drives.

• Computer performance-testing software

  DiskP

  DiskP was an early Core utility for demonstrating and comparing the performance of hard drives and controllers. It was later replaced by COREtest as Core refined its disk-performance testing offering.

• Computer performance-testing software

  COREtest

  COREtest was a DOS-based benchmark and comparison tool used to show relative hard-drive and controller performance. Computer publications, manufacturers, distributors, dealers, and independent evaluators used it in product comparisons and technical assessments.

• 1993

  Accepted acquisition by AiwaM&A

  Background

  Core had remained a private company solely owned by Hal Prewitt since its founding.

  Action taken

  Aiwa acquired Core International. Aiwa was identified in the reference material as a wholly owned subsidiary of Sony.

  Aftermath

  Core became part of Aiwa's corporate structure, but the available material does not establish whether the brand continued independently or how its products were integrated.

  Source

• 1985

  Collaborated with Control Data on PC hard drivesStrategy

  Background

  Core sought a major partner as it expanded its storage business for the personal-computer market.

  Action taken

  Core established a collaboration with Control Data Corporation for the introduction of hard drives for PCs.

  Aftermath

  The partnership strengthened Core's position in the storage market, although the available source does not document its later commercial results.

  Source

• 1984

  Became an IBM value-added resellerStrategy

  Background

  Core's compatibility and storage work created an opportunity to combine IBM personal computers with Core's own products and services.

  Action taken

  Core entered the PC marketplace as an IBM value-added reseller, offering IBM hardware together with Core peripherals, software, storage, and support.

  Aftermath

  IBM authorized and promoted the relationship, broadening Core's role from specialist 5100 support provider to integrated PC solutions vendor.

  Source

• 1983

  Pursued a migration path from IBM 5100 systems to IBM PCsStrategy

  Background

  IBM was withdrawing the 5100 series, leaving users with established software and systems that needed a practical continuation path.

  Action taken

  Core introduced PC51 to run 5100-series BASIC programs on IBM PCs and compatibles, and developed a LAN card linking PCs to IBM 5100 networks.

  Aftermath

  The move allowed Core to support legacy customers while entering the expanding IBM PC and compatible-computer market.

  Source

1. 1Core Internationalen.wikipedia.org