Useful characters and keys

Whilst writing code, comments or designs I often find these characters helpful, for example I often use "↑" to indicate "increase", so I can write "adding more servers ↑availability" or "homepage: ⌂". They should all be unicode characters...

Useful characters

‹›«»
←↑→↓↔↕
$¢£¤¥€
½
‼
‥ (two dot leader) … (ellipsis)
¡¿

§¶º†‡ (text markers)
– — ― (en, em, bar dashes)
™©®℅№

Numbers

¼ ½ ¾
⅓ ⅔
⅛ ⅜ ⅝ ⅞
∞
° degree

Logic

≈ approx equal
≡, ≠ identity
¬, negation not
≤≥
∆ increament

Maths

∏ (product)
∑ (summation)
√ (root)
∂ (partial differential)
ⁿ (super n)

Bullets

■□▪▫○●◘◙◦

⌂ house!