Eset Nod32 Antivirus -

The "32" was added when the software was rewritten for the 32-bit Windows environment, transitioning from a DOS-based utility to a proactive, real-time protection system. II. Core Security Architecture

Founders Peter Paško and Miroslav Trnka developed the first iteration of the software to combat the "Vienna" virus, one of the earliest known PC viruses. ESET NOD32 Antivirus

What is antivirus software, how does it work, and why ... - ESET The "32" was added when the software was

The origins of NOD32 trace back to 1987 in Bratislava, Slovakia. how does it work