> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/sel-faq/setup-and-licensing/installation-activation-lice/how-it-works/the-spectrum-of-activation-opt.md). # Activation Options Comparing ENERCALC SEL's Internet Activation and Manual Activation options and the tradeoffs of each. ## Can you elaborate on the activation options that are available and the pros and cons of each? ENERCALC’s License Agreement for ENERCALC SEL is an attempt to be very flexible for those who can take advantage of it. We don’t restrict installations. Instead, we control activations. By working it that way, we are able to tell users that they are free to install the software on as many machines as they wish, and we use one of a few different methods of ensuring that the maximum number of permissible simultaneous activations is not exceeded. The most flexible method of doing that (for users who can) is through the use of our Internet Activation system. For users who can configure their communications to take advantage of this system, it offers the advantage of being able to share a relatively few number of seats among many users. The second activation option comes into play for those users who cannot configure their networks to permit Internet Activation. We refer to this option as Manual Activation, and it is the least flexible, because the activations are locked to particular computers. These activations do not have the ability to be shared between computers, but they are guaranteed to work. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.enercalc.com/sel-faq/setup-and-licensing/installation-activation-lice/how-it-works/the-spectrum-of-activation-opt.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.