Jon Postel was a prominent computer scientist known for his significant contributions to the development of the Internet. He played a key role in the creation of essential protocols and standards that shaped how data is communicated over networks. His work on the Internet Assigned Numbers Authority (IANA) was critical in establishing rules for domain name registrations and IP address assignments, which are fundamental to the functioning of the Internet today. Postel was also one of the principal architects behind the Transmission Control Protocol/Internet Protocol (TCP/IP), which is the backbone of internet communications. His vision for a decentralized network allowed for the growth of the Internet into a vast and interconnected global system. Through his collaboration with others in the field, he helped foster an open and accessible Internet. Throughout his career, Jon Postel was dedicated to ensuring that the Internet remained a resource for everyone. He advocated for policies that promoted innovation and collaboration among technologists. His legacy continues to influence how we interact with technology and communicate online, reflecting his belief in the power of a free and open Internet. Jon Postel was a central figure in the evolution of the Internet, known for his pioneering work on protocols and standards necessary for its operation. Through his role in the IANA, he helped manage crucial aspects of the Internet's infrastructure. One of his significant contributions was his involvement in developing TCP/IP, which is essential for data exchange online. This protocol laid the groundwork for the modern Internet, enabling seamless communication across diverse networks. Postel remained committed to keeping the Internet an open platform, advocating for accessibility and innovation throughout his career. His efforts have left a lasting impact on how we use technology and engage with the online world today.