… as in the internet address, not the concept of an IT company…Some web site with an impossible name posts the list, the first few of which are here:SYMBOLICS.COM in March 1985BBN.COMTHINK.COMMCC.COMDEC.COMNORTHROP.COMXEROX.COMSRI.COMHP.COMBELLCORE.COMIBM.COMSUN.COMINTEL.COMTI.COMATT.COMGMR.COMTEK.COMFMC.COMUB.COMBELL-ATL.COM in August 1986