The public distribution for PHCpack version 2.3.23 contains

  Ada        Ada sources
  Feedback   realization of feedback laws, by Yusong Wang
  Lib        PHCpack as a library of algorithms
  Maple      simple Maple interface
  MPI        parallel PHCpack, bindings to MPI,
             in collaboration with Yusong Wang, Anton Leykin, Yan Zhuang
  Objects    makefile, .o and .ali files to create phc
  bin        binary versions of phc

The date of the latest major release 2.3 is Independence Day 2005 (4 July).
release 2.3.01 on 2005-07-15 : one bug fix.
release 2.3.02 on 2005-12-28 : numerous patches and changes.
release 2.3.03 on 2006-01-10 : changes in menu for phc -f and lib_celcon.
release 2.3.04 on 2006-02-05 : C bindings to cos/sin for random numbers.
release 2.3.05 on 2006-02-17 : bug fix in per(); phc -q is new option.
release 2.3.06 on 2006-03-16 : fewnomial solver; mpi2track and mpi2cell.
release 2.3.07 on 2006-03-24 : option 0 in phc -v, improved mpi2track.
release 2.3.08 on 2006-05-03 : better mpi2track, mpi2cell_d
release 2.3.09 on 2006-05-12 : new option 0 in phc -f, removed phc -t 
release 2.3.10 on 2006-06-09 : improved option 0 in phc -v and phc -f
release 2.3.11 on 2006-06-15 : AIX warnings and fewnomial bug fix
release 2.3.12 on 2006-06-23 : bug fix when reading systems in phc -p
release 2.3.13 on 2006-08-25 : ACM TOMS Algorithm 846 MixedVol in phc
release 2.3.14 on 2006-08-28 : phc -b calls MixedVol
release 2.3.15 on 2006-09-28 : bug fix in phc -b, improved phc -r
release 2.3.16 on 2006-11-25 : better polyhedral trackers, phc -b and -f
release 2.3.17 on 2006-12-03 : fixed output for univariate and linear -b
release 2.3.18 on 2006-12-18 : bug fix in mpi2cell_d, phc -q extended
release 2.3.19 on 2007-01-02 : more efficient phc -q and mpi2track
release 2.3.20 on 2007-01-14 : better phc -f, lib_track and mpi2track
release 2.3.21 on 2007-01-25 : phc_solve.c calls blackbox solver
release 2.3.22 on 2007-02-05 : improved phc -b and phc_solve
release 2.3.23 on 2007-02-07 : bug fix in phc -b for linear systems
release 2.3.24 on 2007-02-18 : fix in phc -b, better defaults for phc -p
