Microsoft Office 2021 LTSC (Long-Term Servicing Channel) is a specialized version of Office designed for businesses and organizations that require stability, security, and long-term support. Unlike Microsoft 365, Office 2021 LTSC offers a one-time purchase model with no subscription fees, making it ideal for enterprises that prefer a traditional licensing approach. It includes essential apps like Word, Excel, PowerPoint, and Outlook, with performance improvements and new features such as enhanced accessibility tools and better collaboration options. For those needing bulk activation, platforms like MySoftwareKeys offer MAK license keys with multiple activations.