You can search for current or archived topic descriptions on the Defense SBIR/STTR Innovation Portal (DSIP) . 2. MP4 and "On Demand" Features
"Solid" often refers to physical engineering or technical pathways: Dod (583) mp4
In the context of government and professional conferences (like those involving DoD contractors), files are often used for "On Demand" (DoD/DoT) solutions. You can search for current or archived topic
This may refer to a "Solid Feature" presentation or a technical demonstration of a "solid" (hardware or material) capability recorded for review by DoD evaluators. Dod (583) mp4