# Key Points from IRC Log

• Discussion of open-source CAD software options, with BRL-CAD (http://brlcad.org/) being recommended as the primary option, with mentions of avoCADo as an alternative, though noted as less developed.

• Exploration of UAV delivery systems, with estimates that a delivery UAV would cost approximately $1600 and could break even after 40-80 deliveries at $20-40 per delivery, potentially competing with local courier services.

• Technical discussion about using Arduino boards for UAV control systems, with considerations about bandwidth limitations and the need for separate video transmission systems for monitoring multiple UAVs.

• Conversation about digital micromirror device (DMD) chips and their potential applications, including the possibility of using them for head-up displays, maskless lithography, DNA synthesis, and high-resolution 3D printing.

• Exploration of optical solutions for compact head-up displays using fiber optic cables to pipe images to the eye, with discussion of technical challenges including resolution limitations and signal distortion.

• Brief mention of metadata standards for Lego parts libraries and function signatures for software interoperability, suggesting interest in standardized computational representations of instructions.