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The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
Typewriters for Spanish typically have a dedicated key for Ñ/ñ but, as Portuguese uses Ã/ã and Õ/õ, a single dead-key (rather than take two keys to dedicate) is the most practical solution. The tilde symbol did not exist independently as a movable type or hot-lead printing character since the type cases for Spanish or Portuguese would ...
On some keyboards, the c-cedilla key (Ç) is located one or two lines above, rather than on the right of, the acute accent key (´). In some cases it is placed on the right of the plus sign key (+), [38] [39] while in other keyboards it is situated on the right of the inverted exclamation mark key (¡). [40] [better source needed] [41]
In UK and Ireland keyboard layouts, only two alternative use symbols are printed on most keyboards, which require the AltGr key to function. These are: € the euro sign. Located on the "4/$" key. ¦ the broken bar symbol. Located on the "`/¬" key, to the immediate left of "1".
When placed above the relational symbol in an equation or inequality, a question-mark annotation means that the stated relation is "questioned". This can be used to ask whether the relation might be true or to point out the relation's possible invalidity. U+225F ≟ QUESTIONED EQUAL TO; U+2A7B ⩻ LESS-THAN WITH QUESTION MARK ABOVE
ñ has its own key in the Spanish and Latin American keyboard layouts (see the corresponding sections at keyboard layout and Tilde#Role of mechanical typewriters). The following instructions apply only to English-language keyboards. On Android devices, holding N or n down on the keyboard makes entry of Ñ and ñ possible.
PC keyboards designed for non-English use included other methods of inserting these characters, such as national keyboard layouts, the AltGr key or dead keys, but the Alt key was the only method of inserting some characters, and the only method that was the same on all machines, so it remained very popular.
Also note the keyboard had some 55 unique (68 listed per tables above, including comparative symbols but several symbols appear in both monadic and dyadic tables) APL symbol keys (55 APL functions (operators) are listed in IBM's 5110 APL Reference Manual), thus with the use of alt, shift and ctrl keys - it would theoretically have allowed a ...