This article deals on how open hardware combined with digital fabrication fosters sustainable engineering. RESUMEN: El presente artículo trata de como el hardware libre combinado con la fabricación digital aporta a la ingeniería sostenible. 1. Introduction Open hardware refers to the collaborative development of physical devices, such as 3D printers, that are designed and shared openly among users. This movement is characterized by a growing number of projects supported by infrastructure like makerspaces and fablabs, which facilitate innovation and fabrication []. The Arduino microcontroller has played a significant role in this ecosystem, serving as a critical component in many open source projects, including the Rep -rap 3D printer. Overall, open hardware fo sters community collaboration and accelerates technological advancement in digital fabrication. Open hardware and sustainable engineering are interconnected concepts that promote accessibility and innovation in technology development. The movement towards open fabrication, particularly in the realm of microfabrication, encourages collaborative efforts among research communities to develop cost - effective scientific equipment. Low -cost resin 3 -D printing, specifically mask -based stereolithography (MSLA), exe mplifies this trend by providing affordable solutions for rapid prototyping of microdevices, which can significantly enhance sustainable aquaculture practices []. This approach not only reduces costs but also fosters wider participation in technological ad vancements aimed at supporting genetic resource management. s. 2. Sustainable Engineering Massive Open Online Courses (MOOC) ha ve been used to bring access to education in topics related to sustainable engineering i.e. drinking water systems [Bustamante, 2022] . Here, we can highlight the openness of MOOCs and the availability to a massive quantity of interested people. The openness can be interpreted in two senses not mutually exclusive. One sense is open access to the content o f the course. The other sense is the use of open license in the course, in order to be provided by another provider (i.e. government, ministry, foundation, municipality or educational institution among others). 3. Open Hardware Open hardware is also known as open -source hardware (OSH) or libre hardware. Depending on the context , related terms sometimes are used by other authors such as open source electronics, open source consumer electronics products, open source design, open -source sensors, open source actu ators open source laboratory equipment , open source medical devices, open -source devices and/or open -source equipment . I prefer open hardware for its simplicity and generality. 2.1. Open Hardware Licenses As with open -source software (OSS), there are licenses accompanying each open hardware design. Or at least, there should be an attached license. This is not always the case because some open designs do not mention the applicable license. Table 1 shows a list of open hardware licenses and their release year. Table 1 Open Hardware Licenses Short Name Long Name Based on Year TAPR OHL v1.0 Tucson Amateur Packet Radio Open Hardware License v1.0 GNU GPL 2007 CERN OHL v1.0 CERN Open Harware License v1.0 N/A 2011 SHL v0.50 Solderpad Hardware License v0.50 Apache License 2.0 N/A Estimated 2012 SHL v0.51 Solderpad Hardware License v0.51 SHL v0.50 2012 CERN OHL v1.2 CERN Open Harware License v1.2 CERN OHL v1.0 2013 SHL v2.0 Solderpad Hardware License v2.0 SHL v0.51 2018 CERN OHL v2.0 CERN Open Harware License v2.0 CERN OHL v1.2 2020 SHL v2.1 Solderpad Hardware License v2.1 SHL v2.0 2020 Figure 1 Sustainable engineering and Digital Fabrication 4. Digital Fabrication Digital fabrication is also known as digital manufacturing. It is related to 3D printing, additive manufacturing or advanced manufacturing [Saldarriaga]. Design for Manufacturing and Assembly (DfMA) is a design methodology that focuses on simplicity of the design to make the manufacturing as simple and as fast as possible. DfMA should consider digital fabrication and related terms that can contribute to its ideals [Roxas]. 5. Conclusions Sustainable engineering , in the sense of engineering practice and engineering education, can be attained using open hardware and digital fabrication met hods. 6. Declaration of competing interest I declare that I have no significant competing interests including financial or non -financial, professional, or personal interests interfering with the full and objective presentation of the work described in this manuscript. 7. Acknowledgements The author would like to acknowledge the support. 8. Funding This work was supported 9. Author contributions PENDING 10. Data availability statement Further data is available on request by email to the corresponding author.