This paper describes a suite of computer programs designed for evaluating Bessel functions and modified Bessel functions of orders zero and one for a vector of real arguments. These programs can be used accross a wide range of machines and also there can be used when multiple function evaluations are to be performed. If there can be more features in a program, it became more used by the clients. The FNLIB collection of Fullerton are compared with the new programs to improve it. The new softaware are based in FNLIB. All the changes and comparaison are written in the paper. By providing vectorized, portable tools for Bessel function evaluation, the authors have developed software that is helpful for scientific computing. This vectorized design enhances its efficiency for large-scale computations. I recomend this because it is a great tool.
Appearing in ACM Transactions on Mathematical Software, this paper directly contributes to the journal's focus on high-quality numerical software. By providing portable vectorized software for Bessel function evaluation, it provides practical tools for mathematical computation.