LAPACK stands for Linear Algebra PACKage, a software library designed for solving linear algebra problems. It provides routines for performing operations such as solving systems of linear equations, eigenvalue problems, and singular value decompositions. LAPACK is widely used in scientific computing and engineering applications due to its efficiency and reliability. Developed in the late 1980s, LAPACK is built on top of the Basic Linear Algebra Subprograms (BLAS), which offer low-level operations for vector and matrix computations. The library is written in Fortran and is optimized for high-performance computing, making it suitable for large-scale numerical problems across various platforms.