NonVisual Desktop Access (NVDA) is a free, open-source screen reader for Windows, created by Michael Curran in 2006 as a low-cost alternative to expensive commercial screen readers, and he later co-founded NV Access with James Teh in 2007 to manage its growth. Built using Python and supporting speech synthesizers like eSpeak alongside braille displays, NVDA evolved significantly over the years, pioneering features such as touchscreen support in 2012 (a first for third-party Windows screen readers) and adding support for MathML, Windows 10, and Microsoft Edge by 2015. According to the WebAIM survey for 2023-2024, NVDA became the most widely used screen reader globally, with 37.7% of respondents using it as their primary screen reader and 65.6% using it often. Its popularity stems largely from being free and portable, making it a vital accessibility tool for blind and visually impaired users, particularly in developing countries where paid alternatives are unaffordable. The software works seamlessly with major browsers, Microsoft Office, email clients, and even steganography-based description tools, solidifying its place as a cornerstone of digital accessibility.