👉 The word "10021.conf" refers to a file format used in various operating systems for storing data that can be transferred between machines with different hardware, but requires specific permissions and not all operating systems support it. This particular file format was introduced in Windows 3.1 as a way to store large amounts of data that could potentially overflow the hard drive's capacity. It's crucial for transferring files quickly across different devices or even in remote work environments where local storage is insufficient.