O'Callaghan, Michael Angelo, Dairy expert

Chapter 2 - Food Technology

Technology Established; 1840-1940, 100

O'Connor, Charles Yelverton (1843 - 1902), Engineer

Chapter 3 - Water and Irrigation

Water Supplies For Goldmining Development, 153

O'Connor, Colin (1928 - ), Civil engineer

Chapter 6 - Engineering Construction and Building

Sewerage, 363

O'Dwyer, J., Engineer

Chapter 8 - Communications and Computers

Part 1: Communications, 563

O'Grady, Francis Philip ( - 1981), Electrical engineer

Chapter 8 - Communications and Computers

Part 1: Communications, 542, 554

Chapter 13 - Defence Science and Technology

Post-second World War, 920

O'Mullane, G. V., Electrical engineer

Chapter 8 - Communications and Computers

Part 1: Communications, 566

Orlebar, John, Manufacturer

Chapter 2 - Food Technology

Technology Established; 1840-1940, 99

Ormond, D. J., Electrical engineer

Chapter 8 - Communications and Computers

Part 1: Communications, 566

Osborne, William Alexander (1873 - 1967), Physiologist and Medical educator

Chapter 2 - Food Technology

The Coming Of Science, 114

Ovenstone, John Allen (1925 - 1984), Computer scientist

Chapter 8 - Communications and Computers

Part 2: Early Australian Computers And Computing, 589, 590, 594

Chapter 13 - Defence Science and Technology

Post-second World War, 920, 921

Owen, Evelyn Ernest (Evo) (1915 - 1949), Inventor

Chapter 12 - Manufacturing Industry

The Fourth Period - Second World War To The Present, 862

Chapter 13 - Defence Science and Technology

The Second World War, 915

Owen, T. M., Industrial chemist

Chapter 10 - The Mineral Industries

3. Some Highlights Of Australian Minerals Technology, 712

Australian Academy of Technological Sciences and Engineering