Florence Violet McKenzie, Australian electrical engineer (died 1982)

Florence Violet McKenzie, affectionately known as "Mrs Mac", was Australia's first female electrical engineer, founder of the Women's Emergency Signalling Corps (WESC) and lifelong promoter for technical education for women. She campaigned successfully to have some of her female trainees accepted into the all-male Navy, thereby originating the Women's Royal Australian Naval Service (WRANS). Some 12,000 servicemen passed through her signal instruction school in Sydney, acquiring skill in Morse code and visual signalling.

September 28 is the 271st day of the year in the Gregorian calendar; 94 days remain until the end of the year.