Wolfram Research
Wolfram Math World: Conditional Convergence
This page briefly discusses conditional convergence as it pertains to series. Also provides some links to further information about various aspects of series.
Math Words
Math Words: Conditionally Convergent
This site gives a very brief definition sort of discussion of what a conditionally convergent series is. The site has links to convergence tests.
Wolfram Research
Wolfram Math World: Convergent Sequence
This site from MathWorld explains convergent sequences with links to related information. The information is very brief, but examples and formulas are provided.