Nano & Pico lead by how many zero huh?

I always confused by these fundamental units - Nano is 1o^-9 Pico is 10^-12 or vise versa? To be frank, i am not good in memorize numbers. It is kind of tough for me to swift between these two notation. Everybody talked on pico second since the evolution of high-speed devices, suddenly switch gear back to nano second. I felt like, omigosh, how many zero are there for nano???

Since worked on the i-diagram, my mind was filled with the numbers & formulas - formulas that never learn before, no where to reference, nobody know or perhaps only i dunno. Questions like Lease-squared method, reference deduct actual squared, jitter, linear interpolation, why interested on standard deviation but RMS, why rise/fall time fixed to 10/90 and not 20/80 but the compliance tool not even used these two values (this question need to close sooner =P) .

So far as i did programming, single/double never my concern. Not until i met i-diagram. Maybe some ppl will treat 2.083 ns as the signaling rate. Maybe 2.083333ns more accurate. Maybe 2.0833333ns, 2.08333333333, 2.0833333333333ns? The most precision for sw should be 1/480e6. I believe those US Bus validators/designers never care about the precision of the value. The concern is - whether PASSED or FAILED, providing the value is flow within the 5%/10% tolerance level, then is good enough. Maybe some of them only recognized the color for Pass fail. For jitter measurement, the precision of actual period will definately impact the result of the jitter.

I will continue to learn the formulas, memorizes those golden numbers (327 not happened in the latest 4D -_-") and in the mean time, study the graphics programming. Hopefully one day, i will be as smart as i-diagram ron (atleast my matlab skill not bad pun...haha).

The following numbers carried some meaning in my life. Not sure you ever meet before. "Digital life" - Hope you like it ;p

３　０６２４７００ ３　０６２４７７０ ５　３４２０２　１３９４２ ４３１４　０６２４ ３　０６２４７...