2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44884We update our previous calculation of di--jet production in two--photon collisions at future \ee\ colliders, including both beam-- and bremsstrahlung. We then discuss the production of heavy ($c,b,t$) quarks. Our study re--confirms that colliders with much beamstrahlung offer no physics advantages over designs with little beamstrahlung.to appear in the Proceedings of the Linear Collider Workshop, Waikoloa, Hawaii, April 1993; LaTeX with EQUATION.STY, 9 pages, 3 figures available upon request from DREES@WISCPHEN; MAD/PH/776, BU-TH/93-3High Energy Physics - Phenomenologytext