Truncated Positive Normal Model and Extensions R package tpn version 1.12 Provide data generation and estimation tools for the truncated positive normal (tpn) model discussed in Gomez, Olmos, Varela and Bolfarine (2018) <doi:10.1007/s11766-018-3354-x>, the slash tpn distribution discussed in Gomez, Gallardo and Santoro (2021) <doi:10.3390/sym13112164>, the bimodal tpn distribution discussed in Gomez et al. (2022) <doi:10.3390/sym14040665>, the flexible tpn model <doi:10.3390/math11214431> and the unit tpn distribution <doi:10.1016/j.chemolab.2025.105322>. Software Depends: R (>= 4.0.0) Imports: pracma, skewMLRM, moments, VGAM, RBE3 Diego Gallardo <dgallardo@ubiobio.cl> Comprehensive R Archive Network (CRAN) Diego Gallardo [aut, cre], Hector J. Gomez [aut], Yolanda M. Gomez [aut] GPL (>= 2) 2025-08-24 application/tgz https://CRAN.R-project.org/package=tpn doi:10.32614/CRAN.package.tpn