Norman Joseph Woodland was born in Atlantic City on Sept. 6, 1921. As a Boy Scout he lea

rned Morse code,the spark that would ignite his invention.

After spending World War II on the Manhattan Project , Mr. Woodland resumed his studies at the Drexel Institute of Technology in Philadelphia (it is now Drexel University), earning a bachelor’s degree in 1947.

As an undergraduate, Mr. Woodland perfected a system for delivering elevator music efficiently. He planned to pursue the project commercially, but his father, who had come of age in “Boardwalk Empire”-era Atlantic City, forbade it: elevator music, he said, was controlled by the mob, and no son of his was going to come within spittingdistance.

The younger Mr. Woodland returned to Drexel for a master’s degree. In 1948, a local supermarket executive visited the campus, where he implored a dean to develop an efficient means of encoding product data. The dean demurred, but Mr. Silver, a fellow graduate student who overheard their conversation, was intrigued. He

conscripted Mr. Woodland.

An early idea of theirs, which involved printing product information in fluorescent ink and reading it with ultraviolet light, proved unworkable.

But Mr. Woodland, convinced that a solution was close at hand, quit graduate school to devote himself to the problem. He holed up at his grandparents’ home in Miami Beach, where he spent the winter of 1948-49 in a chair in the sand, thinking.

To represent information visually, he realized, he would need a code. The only code he knew was the one he had learned in the Boy Scouts.

What would happen, Mr. Woodland wondered one day, if Morse code, with its elegant simplicity and limitless combinatorial potential, were adapted graphically？ He began trailing his fingers idly through the sand.

“What I’m going to tell you sounds like a fairy tale,” Mr. Woodland told Smithsonian magazine in 1999. “I poked my four fingers into the sand and for whatever reason — I didn’t know — I pulled my hand toward me and

drew four lines. I said: ‘Golly! Now I have four lines, and they could be wide lines and narrow lines instead of dots and dashes.’”

Today, bar codes appears on the surface of almost every product of contemporary life.All because a bright young man, his mind ablaze with dots and dashes, one day raked his fingers through the sand.