Monkey Raptor

This is the list of some non-existing keys on our standard keyboard. Um, US English (US-EN) keyboard.
For you who use Windows operating system, you can hold down the ALT key and then type the number from your right number keys. You'll get the extended ASCII.
For Mac users, it's quite different. This page has the characters list and will explain it to you how to generate the extended ASCII on Macintosh.
For Linux genres, well, you can customize your own key shortcuts.

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Basic Math and Physics symbols

Symbol	Description	alt + ... [Windows]
∞	infinity	236
±	plus or minus	241
≥	greater than or equal	242
≤	less than or equal	243
÷	divided by	246
≈	approximately equal to	247
°	degree	248
½	half	171
¼	quarter	172
¾	three quarter	0190
¹	superscript of one	0185
²	to the second power (squared)	253
³	to the third power (cubed)	0179
√	square root	251
ⁿ	to the nth power	252
‰	permil	0137

Trademark, Copyright, and Registered symbols

Symbol	Description	alt + ... [Windows]
™	trademark	0153
©	copyright	0169
®	registered	0174

For ordinary text, with awesome essence

Symbol	Description	alt + ... [Windows]
‘	opening apostrophe	0145
’	closing apostrophe	0146
“	opening quote	0147
”	closing quote	0148
•	bullet	0149
–	short dash	0150
—	long dash	0151
…	ellipsis	0133
·	middle dot	0183

Currency other than dollar

Symbol	Description	alt + ... [Windows]
€	euro	0128
¢	cent	0162
£	pound	0163
¥	yen	0165

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Try them out here. Type anything from the list or copy/paste any of it.

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Related links :

• ASCII table at Port Raptor
• Sweet UNICODE shapes at Port Raptor
• Quotation mark glyphs at Wikipedia en.wikipedia.org/wiki/Quotation_mark_glyphs
• Complete Math symbols list at Wikipedia en.wikipedia.org/wiki/List_of_mathematical_symbols