Three characters on the .org, X-for-Y. R4A reads as research for all, resources for Africa, or rights for animals.
Rights for animals is a large, well-organised sector with campaigning organisations in every country and substantial public support. Research for all fits the open access movement, where the whole argument is that publicly funded research should be publicly readable.
Resources for Africa suits development organisations working on capacity, infrastructure, or education across the continent.
Each of these has an institutional audience that reads the 4-as-for convention fluently, because programme naming in this shape has become standard across the sector. A name adopted this way is understood on first sight rather than needing to be taught.
Three characters is also simply practical: it fits wherever an organisation’s identity has to go, and it doesn’t get shortened by someone else into something worse.
The name is available. Offers welcome.