Robert (Bob) Eugene McCallum passed away on July14,2025. He was born in Dallas TX on July 4, 1928. He is preceded in death by his parents, Virgil and Frances McCallum (Dallas); brother Walter A McCallum and wife Lois (Rowlett), and sister Juanita Arrington and husband Harold (Midlothian). He is survived by his wife Lynda of 64 plus years (9/10/60), daughter Cheryl Denise McCallum (Houston), brother Joe McCallum (Plano), sister Virginia Edmonds (Mesquite), and many nieces and nephews. Bob graduated from Crozier Tech in Dallas and went to work for Fritz W. Glitz as a draftsman, then was employed by The Atlantic Refining Company as a draftsman until he was drafted into the Army during the Korean War, serving two years at Ft Bliss, El Paso, TX and Edgewood Arsenal, Aberdeen, MD (Edgewood Arsenal) as a cadre and artillery specialist with honors. Upon discharge he graduated from UT Arlington State and UT Austin with a degree in physics, returning to The Atlantic Refining Company (ARCO by the time he retired and now British Petroleum) as an engineer in research and development. He helped in the development of the Alaskan Pipeline, advance mainframe computer technologies for ARCO, and finished his career of 31 years as an advisor to ARCO leadership on the adoption of personal computers (PCs). Bob was an avid golfer and enthusiast, and bowled with The Dallas Bowling Association for many years, a handicap all events champion in 1986-87. His favorite poem was The Calf Path by Sam Foss. He was a devoted husband and father. Private Graveside Service for Family at DFW National Cemetery, August 6th. No flowers, please. Memorials may be made to Hillsdale College (33 E College Street, Hillsdale MI 49242).