  Autonomous mobile robots (AMRs) have been a rapidly expanding research topic
for the past decade. Unlike their counterpart, the automated guided vehicle
(AGV), AMRs can make decisions and do not need any previously installed
infrastructure to navigate. Recent technological developments in hardware and
software have made them more feasible, especially in warehouse environments.
Traditionally, most wasted warehouse expenses come from the logistics of moving
material from one point to another, and is exhaustive for humans to
continuously walk those distances while carrying a load. Here, AMRs can help by
working with humans to cut down the time and effort of these repetitive tasks,
improving performance and reducing the fatigue of their human collaborators.
This literature review covers the recent developments in AMR technology
including hardware, robotic control, and system control. This paper also
discusses examples of current AMR producers, their robots, and the software
that is used to control them. We conclude with future research topics and where
we see AMRs developing in the warehouse environment.
