<sod>'''PHYLIP''' ('''PHYLogeny Inference Package''') is a free [[computational phylogenetics]] package of programs for inferring evolutionary trees ([[Phylogenetics|phylogenies]]).<ref>{{Cite journal | last1 = Felsenstein | first1 = J.| authorlink1 = Joseph Felsenstein| title = Evolutionary trees from DNA sequences: A maximum likelihood approach | doi = 10.1007/BF01734359 | journal = Journal of Molecular Evolution | volume = 17 | issue = 6 | pages = 368–376 | year = 1981 | pmid =  7288891| pmc = }}</ref> It consists of 35 [[Porting|portable]] programs, i.e. the source code is written in C and precompiled executables are available for Windows (95/98/NT/2000/me/XP), Mac OS 8 and 9, Mac OS X, and Linux systems.<ref name="infop">{{cite web<eod>
<sod>'''PHYLogeny Inference Package''' ('''PHYLIP''') is a free [[computational phylogenetics]] package of programs for inferring evolutionary trees ([[Phylogenetics|phylogenies]]).<ref>{{Cite journal |last1= Felsenstein |first1= J. |authorlink1= Joseph Felsenstein |title= Evolutionary trees from DNA sequences: A maximum likelihood approach |doi= 10.1007/BF01734359 |journal= Journal of Molecular Evolution |volume= 17 |issue= 6 |pages= 368–376 |year= 1981 |pmid=  7288891 |pmc= }}</ref> It consists of 35 [[Porting|portable]] programs, i.e., the source code is written in the programming language [[C (programming language)|C]]. The software is released as [[freeware]], in [[source code]], and precompiled [[executable]]s for the [[operating system]]s [[Microsoft Windows|Windows]] (95, 98, ME, NT, 2000, XP, Vista), [[Mac OS 8]], [[Mac OS 9]], [[OS X]], and [[Linux]].<ref name="infop">{{cite web<eod>