: These changes are driven by an expected surface seawater temperature increase of 1–6 °C by 2100.

So 2100/64 asks: What does a century of progress look like when broken into 64 equal parts?

The term 2100/64 represents a blend of hardware or software specification and architectural capability, highlighting a 64-bit processing environment. Whether referring to computing, locomotives, or other technical fields, understanding the significance of the "/64" notation provides insight into the system's capabilities, particularly in terms of memory addressing and performance. As technology continues to advance, the relevance of 64-bit architectures, such as those denoted by 2100/64, will likely persist, underpinning a wide range of applications and systems.

In environmental research, "2100/64" frequently refers to the alarming projection that several major glacier systems will lose relative to 2010 levels by the year 2100.