Kateryna Yushchenko is credited with developing the concept of the Address Programming Language, which she worked on during her evenings, without additional pay, as it was outside her official duties. This language became the world’s first algorithmic language, notable for its use of indirect addressing of higher orders—an innovation later mirrored in the concept of ‘pointers’, which were developed abroad only in 1964. Pointers are now one of the most powerful tools in modern information technology.

Yushchenko was the first woman in the USSR to earn a Doctorate of Physical and Mathematical Sciences in programming. Her algorithms and programmes contributed to significant advancements in thermonuclear processes, space exploration, and missile technology, including ballistic calculations for rocket and space systems.

Between 1961 and 1963, she co-authored the world’s first monograph, ‘Elements of Programming’, and the pioneering textbook ‘Address Programming’, which was immediately translated across Europe.