The Korn Shell, often abbreviated as ksh, is a command-line interpreter for Unix and Unix-like operating systems. Developed by David Korn in the early 1980s, it combines features from the Bourne Shell and the C Shell, offering enhanced scripting capabilities and user-friendly features like command-line editing and job control. Korn Shell supports both interactive and script-based usage, making it versatile for system administration and programming tasks. It includes features such as associative arrays, floating-point arithmetic, and built-in string manipulation, which help users write more efficient and powerful scripts compared to traditional shells like sh or csh.