SKY5513

Are USCIS number and Alien number same?
There are many sections asking for A# (Aline number). Actually, I found one on my EAD (OPT) card, but it says USCIS #. and it's also 9 digit number like alien number.
According to USCIS.gov website, it is same number, but some people say it's totally different one.
Should I put my USCIS number for this Alien number section?
(I attached the capture image from internet for reference)
Thank you.

While you're in the USA you would adjust your status. Read this guide: http://www.visajourney.com/content/i130guide2
Join the "adjustment of status from work, student, or visitor visa" section for more people going through your process.