Weird abbreviations

I almost think I know what some of these mean, but then I look at some others and really wonder. The ones I do know seem to be some kinds of abbreviations or shorthand.

℀ ℀
℁ ℁
ℂ ℂ
℃ ℃
℄ ℄
℅ ℅
℆ ℆
ℇ ℇ
℈ ℈
℉ ℉
ℊ ℊ
ℋ ℋ
ℌ ℌ
ℍ ℍ
ℎ ℎ
ℏ ℏ
ℐ ℐ
ℑ ℑ
ℒ ℒ
ℓ ℓ
℔ ℔
ℕ ℕ
№ №
℗ ℗
℘ ℘

ℙ ℙ
ℚ ℚ
ℛ ℛ
ℜ ℜ
ℝ ℝ
℞ ℞
℟ ℟
℠ ℠
℡ ℡
™ ™
℣ ℣
ℤ ℤ
℥ ℥
Ω Ω
℧ ℧
ℨ ℨ
℩ ℩
K K
Å Å
ℬ ℬ
ℭ ℭ
℮ ℮
ℯ ℯ
ℰ ℰ
ℱ ℱ

Ⅎ Ⅎ
ℳ ℳ
ℴ ℴ
ℵ ℵ
ℶ ℶ
ℷ ℷ
ℸ ℸ
ℹ ℹ
℺ ℺
℻ ℻
ℼ ℼ
ℽ ℽ
ℾ ℾ
ℿ ℿ
⅀ ⅀
⅁ ⅁
⅂ ⅂
⅃ ⅃
⅄ ⅄
ⅅ ⅅ
ⅆ ⅆ
ⅇ ⅇ
ⅈ ⅈ
ⅉ ⅉ
⅋ ⅋
ⅎ ⅎ