Terms of use

Last updated 12 November 2026

Who we are

This site belongs to Dr Osama El-Halawany, Cairo, Egypt. Write to support@oelhalawany.com for orders and help, sales@oelhalawany.com for corporate licences, and author@oelhalawany.com for the author.

What you buy

Our products are digital: books in PDF and Word, Excel tools, browser calculators, presentations and course files. Each product page lists exactly what is inside. You receive the files by download right after payment.

Who processes the payment

Card payments in US dollars are processed by Lemon Squeezy, our reseller and merchant of record, under its own buyer terms. Payments in Egyptian pounds by Instapay are confirmed by us, and the files reach you by e-mail within 24 hours.

Your licence

Each purchase gives one person the right to use the files for their own work or study. The Excel tools carry a licence key in your name. Please do not share, resell or upload the files elsewhere. For a team, ask sales@oelhalawany.com for a corporate licence.

The figures inside

Every worked example uses Meridian, a model hospital, with educational figures built on Egyptian market averages. They teach the method; they are not advice for a particular hospital. Check every decision against your own hospital's data before you act on it.

Copyright

The books, tools, calculators, designs and texts on this site are the work of Dr Osama El-Halawany and are protected by copyright.

Changes and updates

We correct and improve our products. Buyers receive the updated edition of the product they bought free of charge.

Law

These terms follow the laws of the Arab Republic of Egypt.