alphanumeric 'stuff'

[sherry!]

Hope I spelled that right ? Anyway, when trying to register a password for some site, I try to make it as secure as possible, using a variety of letters, symbols & etc. Often, I get a message that I need to use alpha numeric symbols or whatever. Give me some advice here, please ?
And thanks for answering my first post. 

[Transfusion]

In computers designed for English language users, alphanumeric (sometimes seen as ) are those comprised by the combined set of the 26 alphabetic characters, A to Z, and the 10 Arabic numerals, 0 to 9. In some usages, the alphanumeric character set may include both upper and lower case letters, punctuation marks, and symbols (such as @, &, and *, for example). For languages other than English, alphanumeric characters include letter variations such as é and ç. For some computer usages, such as file naming, alphanumeric characters are strictly limited to the 26 alphabetic characters and 10 numerals; however, for other usages, such as programming, other keyboard symbols are sometimes permitted.

http://whatis.techtarget.com/definition/0,,sid9_gci763592,00.html


If you want a secure password generator, I use this:
https://www.grc.com/passwords.htm