Delay Line Memory: How Computers Remembered Before RAM

delay line memory.
It was random in a different sense; it involved turning electrical pulses into sound waves,
sending them through long tubes of mercury, and re-electrifying them at the other end.

1. calculator_memory_technologies
2. Storing data in waves: Delay line memory
3. Delay Line Memory: How Computers Remembered Before RAM
4. "Uncle" Bob Martin - "The Future of Programming"