Pick & place machines (P&PS) are a common type of component placement machine called surface mount technology (SMT).
The process used to attach components to a PCB is soldering. There are multiple soldering methods used to bond components to a bare PCB.
An SMD, or surface-mounted device, is an electronic component that you just would find on a board. An SMT is a way of placing electronic parts (like an SMD) on the board. In electronic manufacturing services, the SMT procedure frequently works with SMDs, probably adding to the uncertainty.