ftp://ftp.padua.org/pub/NeXT/science/  direct

[DIR]unix/  direct  21640+ twin directories
[DIR]physics/  direct  366+ twin directories
[DIR]misc/  direct  65535+ twin directories
[DIR]medicine/  direct  138 twin directories
[DIR]math/  direct  13168+ twin directories
[DIR]libs/  direct  20215+ twin directories
[DIR]geography/  direct  3808+ twin directories
[DIR]ee/  direct  8516+ twin directories
[DIR]chemistry/  direct  169 twin directories
[DIR]astro/  direct  2625+ twin directories
[DIR]apps/  direct  65535+ twin directories