2. Only when the other ½ needed is the ring magnetised
½ the current needed to magnetise the ferrite ring

3. A 10.8×10.8 cm card of core memory of 32x32 = 1024 bits, as used in a CDC 6600 Originally all made by hand

4. 1nm mm
10-9 m m
1/10,000,000 = 10-7
So it should be possible to create a molecular memory with a density 1014 x greater

6. An Wang Sells Core Memory Patent to IBM
March 4, 1956
An Wang Sells Core Memory Patent to IBM
An Wang sells his patent for ferrite core memory to IBM for $500,000. One of the most important inventions in computer history, ferrite core memory was widely used in digital computers from the mid-1950s until the mid-1970s. The U.S. Patent Office awarded Wang the patent for what he called a pulse transfer controlling device in Jay Forrester at MIT is considered the inventor of core memory.
Harry Kroto 2004