I would to share few important symbols using Keyboard.
Alt +
0153..... ™... trademark symbol
Alt + 0169.... ©.... copyright symbol
Alt + 0174..... ®....registered trademark symbol
Alt
+ 0176 ...°......degre e symbol
Alt + 0177 ...±....plus-or -minus sign
Alt + 2 ......☻.....black
smiley face
Alt + 15.....☼.....sun
Alt + 12......♀.....female
sign
Alt + 11.....♂......male
sign
Alt + 6.......♠.....spade
Alt + 5.......♣......
Club
Alt + 3.............. Heart
Alt + 4.......♦......
Diamond
Alt + 13......♪.....eighth
note
Alt + 14......♫......
beamed eighth note
Alt + 8721.... ∑.... N-ary summation (auto sum)
Alt + 251.....√.....square root check mark
Alt + 8236.....∞..... infinity
Alt + 24.......↑..... up
arrow
Alt + 25......↓......
down arrow
Alt + 26.....→.....right
arrow
Alt + 27......←.....left
arrow
Alt + 18.....↕......up/down
arrow
Alt + 29......↔...left
right arrow