Wolfram Alpha

wolframalpha.com

पेजों का लिंक देने की बजाय math, science और factual सवालों के जवाब खुद calculate करता है। importable source से ज्यादा fact-checking साथी के तौर पर बेहतर।

Wolfram Alpha computes an answer to a math, unit-conversion, or factual query rather than returning a page to read, which makes it better suited to checking a specific number while building a notebook than to importing as a source. It's a useful check when you need to verify a calculation or a fact the notebook relies on. There's no page or document to hand to the notebook here — it's a tool you use alongside the research, not something you cite in it.