ThunderByte Antivirus

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ThunderBYTE Anti-Virus (TBAV) was an early antivirus software product. It was created by Dutchman Frans Veldman in 1988, and published by his company, ESaSS B.V. It was mainly designed for DOS, but there were also versions supporting Microsoft Windows. TBAV was known for its fast scan speed, heuristics-based scanner, and Anti-Vir.Dat files tracking known-good file information.

Antivirus software computer software to defend against malicious computer viruses

Antivirus software, or anti-virus software, also known as anti-malware, is a computer program used to prevent, detect, and remove malware.

Netherlands Constituent country of the Kingdom of the Netherlands in Europe

The Netherlands, informally Holland for the original County of Holland, is a country in Northwestern Europe with some overseas territories in the Caribbean. In Europe, it consists of 12 provinces that border Germany to the east, Belgium to the south, and the North Sea to the northwest, with maritime borders in the North Sea with those countries and the United Kingdom. Together with three island territories in the Caribbean Sea—Bonaire, Sint Eustatius and Saba—it forms a constituent country of the Kingdom of the Netherlands. The official language is Dutch, but a secondary official language in the province of Friesland is West Frisian. In the northern parts of the country, Low German is also spoken.

DOS group of closely-related PC-compatible operating systems

DOS is a platform-independent acronym for Disk Operating System, which was initially introduced by IBM for the System/360 mainframe and later became common shorthand for the popular family of disk-based operating systems for x86-based IBM PC compatibles. DOS primarily consists of Microsoft's MS-DOS and a rebranded IBM version under the name PC DOS, both of which were introduced in 1981. Later compatible systems from other manufacturers are DR DOS, ROM-DOS, PTS-DOS, Embedded DOS, FreeDOS (1998), and RxDOS. MS-DOS dominated the IBM PC compatible market between 1981 and 1995.

Originally ThunderBYTE used a dedicated ISA card to provide protection before the operating system was even loaded. Later, a software-only product was released, which soon displaced the hardware offering. It was distributed as shareware.

Industry Standard Architecture 16-bit internal bus of IBM PC/AT

Industry Standard Architecture (ISA) is the 16-bit internal bus of IBM PC/AT and similar computers based on the Intel 80286 and its immediate successors during the 1980s. The bus was (largely) backward compatible with the 8-bit bus of the 8088-based IBM PC, including the IBM PC/XT as well as IBM PC compatibles.

Operating system software that manages computer hardware resources

An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.

Shareware is a type of proprietary software which is initially provided free of charge to users, who are allowed and encouraged to make and share copies of the program. Shareware is often offered as a download from a website or as a compact disc included with a magazine. Shareware is available with most computer software. Shareware differs from open-source software, in which the source code is available for anyone to inspect and alter; and freeware, which is software distributed at no cost to the user but without source code being made available.

In 1998, TBAV was sold to Norman ASA, which discontinued ThunderBYTE as a product.

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