The files zic.c zdump.c ialloc.c scheck.c tzfile.h private.h tzselect.ksh checktab.awk come from the tzcode1998b package by Arthur David Olson et.al. The files africa antarctica asia australasia europe northamerica southamerica pacificnew etcetera factory backward systemv solar87 solar88 solar89 iso3166.tab zone.tab leapseconds yearistype come from the tzdata1998b package by Arthur David Olson et.al. These packages may be found at ftp://elsie.nci.nih.gov/pub/. Commentary should be addressed to tz@elsie.nci.nih.gov.