Erlang, Elixir, Chaos Engineering, Testing, Benchmark.
It’s a list of side effects that the program performs. For example, strace tool prints a list of syscalls performed by a process: $ strace echo "hello world" ... newfstatat(1, "", {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x3), ...}, AT_EMPTY_PATH) = 0 ioctl(1, TCGETS, 0x7ffc227ed410) = -1 ENOTTY