In 1988 Koster sold out of the joint venture, developed real estate and worked as a computer consultant.<ref>[http://www.linkedin.com/pub/herman-koster/0/7b7/960 linkedin]</ref> | In 1988 Koster sold out of the joint venture, developed real estate and worked as a computer consultant.<ref>[http://www.linkedin.com/pub/herman-koster/0/7b7/960 linkedin]</ref> |