Allow me to interpret all the numbers on this lifting body for y'all out there who may be wondering about it:
The "NASA" on the right rudder refers, obviously, to the organization which hired this M2-F3 to perform their flights. The paint is painless, don't worry, and does not cause harm or pain to the craft.
The number, 803, refers to the amount of times the spacecraft has crashed, fallen, or run into something. It doubles as a serial number.
The term "USA F" can refer to multiple things, actually. The "USA" indicates this craft is currently in service of the United States. The letter "F" indicates that the craft in mention is female. Should the gender of the craft be subject to change, the letter may be changed to "M" (Male), "N" (Neutral), "NB" (Non-Binary), or another as needed.
You can see the NASA logo again, on the craft's front. This is because this particular Northrop M2-F3 enjoys having a tattoo here and there, and abides by the organization (NASA)'s rules on frame markings.
This is SATIRE. Please do not crucify me.