The earliest mention of the Access database executing system commands was in 1986, and it ended up fooling a lot of people. Haha! But this feature of executing system commands with public permissions is kind of useless... Let me speculate a bit and offer some comfort to the folks I fooled.
Many friends say that commands cannot be executed with public permissions, but actually they can be — the prerequisite is starting the SQL Server Agent service. In fact, SQL Server Agent is essentially a task scheduler.