Мы в TelegramFor those looking to secure a "hot download" or manage an existing installation, here is the current landscape for PTC Mathcad 15.
As of May 2026, is officially considered a "legacy" product and is no longer available for new purchase or direct download from PTC's primary sales channels . While many engineers still prefer its classic interface and specific features like plot animations, the software reached its official End-of-Sale on December 31, 2021.
If you have an active maintenance contract, you may still be able to access installation media through the PTC Customer Portal , though availability is strictly limited to those with verified entitlements.