Bivariate Laplace Transforms, Stochastic Orders, and Entropy Measures in Reliability R package BivLaplaceRL version 1.0.0 Implements methods for bivariate and univariate Laplace transforms of residual lives and reversed residual lives, associated stochastic ordering concepts, and entropy measures for reliability analysis. The package covers: (1) Bivariate Laplace transform of residual lives and stochastic comparisons based on the bivariate Laplace transform order of residual lives (BLt-rl), including weak bivariate hazard rate, mean residual life, and relative mean residual life orders, nonparametric estimation, and NBUHR/NWUHR aging class characterisation; Jayalekshmi, Rajesh, and Nair (2022) "Bivariate Laplace Transform of Residual Lives and Their Properties" <doi:10.1080/03610926.2022.2085874>; (2) Bivariate Laplace transform order of reversed residual lives (BLt-Rrl), reversed hazard gradient, reversed mean residual life, and the associated stochastic orders (weak bivariate reversed hazard rate, weak bivariate reversed mean residual life); Jayalekshmi, Rajesh, and Nair (2022) "Bivariate Laplace Transform Order and Ordering of Reversed Residual Lives" <doi:10.1142/S0218539322500061>; (3) Univariate Laplace transform of residual life, hazard rate, mean residual life, and the corresponding stochastic orders (Lt-rl order, hazard rate order, MRL order), together with a nonparametric estimator. Shannon entropy and Golomb's (1966) information generating function are also provided. Parametric families supported include the Gumbel bivariate exponential, Farlie-Gumbel-Morgenstern (FGM), bivariate power, and Schur-constant distributions. Plotting utilities and a simulation framework for evaluating estimator performance are also provided. Software Depends: R (>= 4.1.0) Imports: stats, graphics Suggests: testthat (>= 3.0.0), knitr, rmarkdown, MASS, survival, covr Mahesh Divakaran <imaheshdivakaran@gmail.com> Comprehensive R Archive Network (CRAN) Mahesh Divakaran [aut, cre] (ORCID: <https://orcid.org/0000-0002-3488-0857>, affiliation: Amity School of Applied Sciences, Amity University Lucknow), S. Jayalekshmi [aut, ctb] (affiliation: Department of Statistics, Cochin University of Science and Technology), G. Rajesh [aut] (affiliation: Department of Statistics, Cochin University of Science and Technology), N. Unnikrishnan Nair [aut] (affiliation: Department of Statistics, Cochin University of Science and Technology) GPL-3 2026-04-30 application/tgz https://CRAN.R-project.org/package=BivLaplaceRL doi:10.32614/CRAN.package.BivLaplaceRL en-GB