The FIFO input-character buffer in an EIA-232 serial line card. So called from DEC terminology used on DH and DZ line cards for the VAX and PDP-11, presumably because it was a storage space for fungible stuff that went in at the top and came out at the bottom.
Dream Dictionary
Definition:
Seeing a silo in your dream, suggests that you need to save your money. Perhaps you are wasting your money on frivolous things and need to think about saving up.