When your business gets big enough, you need an IT department to handle security. How big can you get before that’s needed? There’s no set size, but one possible measure is whether you still know the ...

If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...

Most of us have little trouble working out how many milliliters are in 2.4 liters of water (it's 2,400). But the same can't be said when we're asked how many minutes are in 2.4 hours (it's 144).

REDUCE allows you to iterate through your data, building your result step-by-step, in the same way a loop operates in a ...

The 35-year-old saga of Kryptos, an enigmatic sculpture containing four encrypted messages outside the CIA headquarters, just took a bizarre twist. Though cryptographers broke the first three passages ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

New policies refine the responsibilities of authors and require author contribution statements in Nature Chemical Biology research papers. When a manuscript is submitted to Nature Chemical Biology, ...

Carol M. Kopp edits features on a wide range of subjects for Investopedia, including investing, personal finance, retirement planning, taxes, business management, and career development. Michael Boyle ...

Sarah D. Sparks is a reporter and data journalist for Education Week who covers the teaching profession and pedagogy for Education Week. She has covered education research and the science of learning ...