HTTP Status Messages

When a browser requests a service from a web server, an error might occur.
This is a list of HTTP status messages that might be returned:
1xx: Information

Message:
Description:

100 Continue
Only a part of the request has been received by the server, but as long as it has not [...]

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HTML Language Code Reference

ISO Language Codes
The HTML lang attribute can be used to declare the language of a Web page or a portion of a Web page. This is meant to assist search engines and browsers.
According to the W3C recommendation you should declare the primary language for each Web page with the lang attribute inside the [...]

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HTML URL Encoding Reference

URL encoding converts characters into a format that can be safely transmitted over the Internet.

URL – Universal Resource Locator
Web browsers request pages from web servers by using a URL.
The URL is the address of a web page like: http://www.w3schools.com.

URL Encoding
URLs can only be sent over the Internet using the ASCII character-set.
Since URLs often contains characters [...]

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HTML Symbol Entities Reference

HTML Symbol Entities
This entity reference includes mathematical symbols, Greek characters, various arrows, technical symbols and shapes.
Note: Entity names are case sensitive.

Math Symbols Supported by HTML

Character
Entity Number
Entity Name
Description

∀
∀
∀
for all

∂
∂
∂
part

∃
∃
&exists;
exists

∅
∅
∅
empty

∇
∇
∇
nabla

∈
∈
∈
isin

∉
∉
∉
notin

∋
∋
∋
ni

∏
∏
∏
prod

∑
∑
∑
sum

−
−
−
minus

∗
∗
∗
lowast

√
√
√
square root

∝
∝
∝
proportional to

∞
∞
∞
infinity

∠
∠
∠
angle

∧
∧
∧
and

∨
∨
∨
or

∩
∩
∩
cap

∪
∪
∪
cup

∫
∫
∫
integral

∴
∴
∴
therefore

∼
∼
∼
simular to

≅
≅
≅
approximately equal

≈
≈
≈
almost equal

≠
≠
≠
not equal

≡
≡
≡
equivalent

≤
≤
≤
less or equal

≥
≥
≥
greater or equal

⊂
⊂
⊂
subset of

⊃
⊃
⊃
superset of

⊄
⊄
⊄
not subset of

⊆
⊆
⊆
subset or equal

⊇
⊇
⊇
superset or equal

⊕
⊕
⊕
circled plus

⊗
⊗
⊗
cirled times

⊥
⊥
⊥
perpendicular

⋅
⋅
⋅
dot operator

Greek Letters Supported by HTML

Character
Entity Number
Entity [...]

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HTML ISO-8859-1 Reference

Modern browsers supports several character-sets:

ASCII character set
Standard ISO character sets
Mathematical symbols, Greek letters, and other symbols

ISO-8859-1
ISO-8859-1 is the default character set in most browsers.
The first 128 characters of ISO-8859-1 is the original ASCII character-set (the numbers from 0-9, the uppercase and lowercase English alphabet, and some special characters).
The higher part of ISO-8859-1 [...]

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HTML ASCII Reference

The ASCII character-set is used to send information between computers on the Internet.

The ASCII Character Set
ASCII stands for the “American Standard Code for Information Interchange”.  It was designed in the early 60’s, as a standard character-set for computers and hardware devices like teleprinters and tapedrives.
ASCII is a 7-bit character set containing 128 [...]

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