Recent technological advancements that employ computer-based controls of hazardous energy (e.g., mechanical, electrical, pneumatic, chemical, and radiation) conflict with OSHA’s existing lock-out/tag-out standard. These computer-based controls have become more prevalent as equipment manufacturers modernize their designs. Additionally, national consensus standards and international standards harmonization govern the design and use of computer-based controls. This approach of controlling hazardous energy is more accepted in other nations, which raises issues of needing to harmonize U.S. standards with those of other countries. The Agency has recently seen increased requests for variances for these devices. This RFI will be useful in understanding the strengths and limitations of this new technology and potential hazards to workers. The agency may also hold a stakeholder meeting and open a public docket to explore the issue.