C/C++ Reference. "This site is meant to be used by more-or-less experienced C++ programmers, who have a good idea of what they want to do and simply need to look up the syntax."

etrace 1.7. "[A] simple but efficient utility that allows the display of a function call tree in a C program at run-time.... gcc ... has a nifty feature called "instrument-functions", that adds a couple of function calls to all functions in your code. Every time a function starts, a function called __cyg_profile_func_enter() is called, and every time a function exits, a function called __cyg_profile_func_exit() is called. The code in ptrace.c simply redirects the information gathered at each call to a text file." Lest this site ever go down, I maintain a copy of etrace-1.7.tar.gz locally.

GNU C Library, The. "The GNU C library, described in this document, defines all of the library functions that are specified by the ISO C standard, as well as additional features specific to POSIX and other derivatives of the Unix operating system, and extensions specific to the GNU system."

Standard Template Library, The. "This site documents all of the components (classes, functions, and concepts) in the SGI Standard Template Library."

ACM Digital Library. "Full text of every article ever published by ACM."

CiteSeer. "[CiteSeer] is a scientific literature digital library that aims to improve the dissemination and feedback of scientific literature, and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness."

DBLP Bibliography. "The DBLP server provides bibliographic information on major computer science journals and proceedings."

Theoretical Computer Science Cheat Sheet. An incredibly handy (and pretty) reference for definitions, series, identities, trees, recurrences, probability, trigonometry, matrices, number theory, graph theory, geometry, calculus, and more.

Wikipedia. A free, open-content encyclopedia.

Bart's way to create bootable CD-Roms (for Windows/Dos). "This will create a bootable CD-Rom using one boot image. The boot image is a sector by sector image taken from a bootable floppy. When a PC boots from floppy this is normally done from the first floppy drive, known as drive number 0 or as drive A:. So, to let the CD-Rom boot there must be some mechanism that emulates a floppy drive (drive number 0)."

Elements of Style, The. William Strunk, Jr. "Asserting that one must first know the rules to break them, this classic reference book is a must-have for any student and conscientious writer. Intended for use in which the practice of composition is combined with the study of literature, it gives in brief space the principal requirements of plain English style and concentrates attention on the rules of usage and principles of composition most commonly violated."

Merriam-Webster Online. Merriam-Webster Online Dictionary and Merriam-Webster Online Thesaurus.

Fool.com. Includes the Motley Fool's Fool's School and Quotes and Data.

Hoover's Online. "Hoover's, Inc., delivers comprehensive company, industry, and market intelligence that drives business growth. Our database of 12 million companies, with in-depth coverage of 40,000 of the world's top business enterprises, is at the core of our business tools and services that customers find vital to their business operations. Hoover's editorial staff of some 80 editors and researchers bring vital business information and knowledge to their coverage, updating the site daily to bring our visitors and subscribers the most up-to-date business information in the industry."

InvestorWords.com. The "most comprehensive financial glossary you'll find anywhere, online or off."

MarketWatch. "Stock Market Quotes - Business News - Financial News." Good for looking up funds' turnover rates.

Morningstar. "Chicago-based Morningstar, Inc. is a global investment research firm, offering an extensive line of products and services for individuals, financial advisors, institutions, and the media. As a trusted, independent company, Morningstar provides information, data, and analysis of stocks, mutual funds, exchange-traded funds, closed-end funds, and variable annuity/life subaccounts." Of particular note is Morningstar's list of index returns.

MSN Money - Stocks: Investing. "Welcome to stock research" and this glossary.

Reuters.com: Stock Overview. "Start your research for a Company's stock data here."

SEC Filings & Forms (EDGAR). "All companies, foreign and domestic, are required to file registration statements, periodic reports, and other forms electronically through EDGAR. Anyone can access and download this information for free. Here you'll find links to a complete list of filings available through EDGAR and instructions for searching the EDGAR database."

T. Rowe Price's Market Summaries. "Staying informed about recent market trends and developments is important, even if you're a buy-and-hold investor. To shed light on your current investments and help you identify new opportunities, T. Rowe Price provides extensive information about what's happening in U.S. and international markets. Whether you're looking for investment commentary, recent benchmark performance data, or a long-term perspective, you'll find it here."

Yahoo! Finance. "Historical chart data and daily updates provided by Commodity Systems, Inc. (CSI). Quote data, Market Cap and Avg Vol provided by Reuters. S&P 500 Index provided by ComStock."

Zacks Investment Research. "Zacks Investment Research is a Chicago based firm with over 24 years of experience in providing institutional and individual investors with the analytical tools and financial information necessary to the success of their investment process."

Not So Short Introduction to LaTeX 2e. A handy reference for LaTeX--searchable, no less, which is more than can be said for the canonical books!

TeX Reference Card. "For Plain TeX."

Using Imported Graphics in LaTeX 2e. "This document explains how to use imported graphics in LaTeX 2e documents."

Math Forum: Ask Dr. Math. College Level Archive.

MathWorld. "The web's most extensive mathematics resource."

29A Labs. "We code viruses for the fun of it, because it's our hobby, not because we want to harm other people or to get ourselves into trouble."

CNET News.com. "CNET Networks, Inc. (www.cnetnetworks.com) is a premier global interactive content company that informs, entertains, and connects large, engaged audiences with content in the personal technology, games and entertainment, and business technology categories."

Cryto-Gram. "Crypto-Gram is a free monthly e-mail newsletter on computer security and cryptography from Bruce Schneier (author of Secrets and Lies and Applied Cryptography, inventor of Blowfish and Twofish, CTO and founder of Counterpane Internet Security, Inc., general crypto pundit and occasional crypto curmudgeon)."

SearchSecurity.com. "The news and tips source on informations ecurity and firewalls."

Slashdot. "News for nerds, stuff that matters."

worm blog. A "blog about the worm problem, technology, detection, and defenses."