The CX II improved the graphing speed significantly over the previous generation. It also added features like:
The "II" series introduced built-in Python programming capabilities. This is a major shift from the older TI-BASIC language, allowing students to learn the world’s most popular programming language directly on the calculator hardware.
In software, you might see:
ti = "Texas Instruments"
cx = "customer_experience"
ii = 2
cas = "compare_and_swap"
Or in assembly: MOV CX, II and CMP CAS. But concatenated as a search string, it's too vague.