Ronald B. Johnson, 69, an executive with the National Bureau of Standards who retired in 1988 as deputy director of its materials science and engineering laboratory, died Feb. 21 after a heart attack. He collapsed on the street in Prince Frederick and was pronounced dead at Calvert Memorial Hospital.

Mr. Johnson had worked 26 years at the National Bureau of Standards, which now is the National Institute of Standards and Technology. His career included responsibility for all aspects of the budget process, the introduction of computers and computer training.

In retirement, he was president, vice president, auditor and treasurer of the Standards Alumni Association.

He was born in Santa Monica, Calif. He served in a Marine Corps intelligence unit in Europe during the early years of the Cold War, and he graduated from the University of Maryland.

He was a former district governor of Rotary International for the district that includes Washington and nost of Maryland. He was a former president of the Rotary Club of Potomac and he helped found and charter the Rotary Club of Germantown.

In retirement, he lived in Solomons. He was a member of the Rotary Club of Prince Frederick.

Survivors include his wife of 32 years, Bette Johnson of Solomons; a stepson, Bill Campbell of Solomons; a granddaughter; and two great-grandchildren.