2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149213Report in extended abstract form. Based on talk given at Strings '95, Los Angeles, CA. This is a summary of the findings initially presented in hep-th/9505080. Results of a step (the complete classification of free fermionic solutions to $N=1$ spacetime) in the search for stringy three-generation SO(10) SUSY-GUTs are reviewed.3 pages, jytex; hep-th # changeHigh Energy Physics - Theorytext