Some time ago I considered getting a useful tattoo. Useful like
name, birthdate and maybe other information suitable to locate relatives in case of emergency
ruler (if you stopped growing)
Morse alphabet
Smith Chart
graphical rendering of an encryption algorithm (I imagine that there are pleasant renderings)
I think skin might stretch or shrink. I now carry a spool of bright yellow thread and scissors, in case I have to measure things (and a needle:)
Some time ago I considered getting a useful tattoo. Useful like
name, birthdate and maybe other information suitable to locate relatives in case of emergency
ruler (if you stopped growing)
Morse alphabet
Smith Chart
graphical rendering of an encryption algorithm (I imagine that there are pleasant renderings)
I think skin might stretch or shrink. I now carry a spool of bright yellow thread and scissors, in case I have to measure things (and a needle:)