In addition to being an IM, Danny Kopec was also a computer science professor at Brooklyn College. A smart guy! His best days as a player were behind him, but he achieved some repute as an author, most recently for his collaboration with Lubosh Ftacnik and Walter Browne in the Quality Chess book Champions of the New Millennium. American players of my generation and earlier may remember him for promoting what he dubbed the Kopec System, which was 3.Bd3 against the Sicilian. (He wasn't the first player to use this against 2...d6, 2...e6, or 2...Nc6, but he did use it consistently over the years against 2...d6, and like Ken Smith in the case of the Smith-Morra Gambit, was for a time its tireless promoter.)
He passed away this past Sunday; rest in peace.