another thing that floats
- ghaerr/elks - Embeddable Linux Kernel Subset - Linux for 8086 (github.com)
ELKS is a project providing a Linux-like OS for systems based on the Intel IA16 architecture (16-bit processors: 8086, 8088, 80188, 80186, 80286, NEC V20, V30 and compatibles). Such systems are ancient computers (IBM-PC XT / AT and clones) as well as more recent SBCs, SoCs, and FPGAs. ELKS supports networking and installation to HDD using both MINIX and FAT file systems.
- Lava balloon (Wikipedia)
A lava balloon is a gas-filled bubble of lava that floats on the sea surface. It can be up to several metres in size. When it emerges from the sea, it is usually hot and often steaming. After floating for some time it fills with water and sinks again.