المكتبة الرقمية للوظائف الرياضية التابعة للمعهد الوطني للمعايير والتكنولوجيا (DLMF)
The NIST Digital Library of Mathematical Functions (DLMF) serves as the authoritative, peer-reviewed successor to the Abramowitz and Stegun Handbook
حساب
حاسبة أسعار قولبة البلاستيك - الحقن
Great for rapid estimations of the cost of your next plastic injected part. It has a nice database of plastic
الآلة الحاسبة العلمية GeoGebra
Basic but does it well, with history, fractions and all features you want from a scientific calculator: GeoGebra Scientific is
FEM مجاني للتثبيت أو عبر الإنترنت
FEM software. Install is normally required (Mac, Windows, Linux) … but an online version is available (look at the right
جدول بيانات تعاوني عبر الإنترنت من Framacalc
Not the most feature-rich spreadsheet, but ZERO install or registration: Framacalc is a collaborative, web-based spreadsheet service hosted by Framasoft
MH-Audio Sound and Audio Calculators (Archive)
A very good resource for online Audio Calculators, classified into 6 categories: Loudspeaker Crossover Acoustic Electronic Turntable Various that really
الموسوعة الإلكترونية لتسلسلات الأعداد الصحيحة (OEIS)
The largest online integer sequences database, searchable. It provides a searchable interface to identify sequences by numerical terms, keywords, or
محول الوحدات عبر الإنترنت
Efficient and well organised (be sure to look at the “by Family” drop-down and not stay at the “Most Popular”
مرجع وولفرام ألفا للعلوم - الحوسبة
Provides engineering information and problem solving techniques and maths, all powered by a powerful search engine: WolframAlpha functions as a
جداول إحصائية
Provides all the statistical tables when MS Excel has no formula to compute it automatically. All these tables here are