ACX-2745 is a robot in Isaac Asimov's Robot series.
About ACX-2745[]
ACX-2745 is a Solarian robot. A typical non-humaniform Solarian robot, ACX-2745 was part of the domestic staff serving the mansion assigned to Earthplainclothesman Elijah Baley during his investigation on Solaria. Like all Solarian robots, it was highly specialized in its function, which appeared to be that of a general attendant or guide. Its physical design was utilitarian, with a matte, grayish finish and a distinctive black-and-white checkered shoulder insignia that served as its serial number.
ACX-2745 demonstrated the extreme specialization of Solarian robotics; when summoned by Baley and R. Daneel Olivaw, its sole action was to silently lead them to the conversation room upon command. It displayed the typical positronic obedience to a direct order, identifying itself only by its alphanumeric designation when asked for a name by Baley, confirming the Solarian custom of referring to robots by serial number rather than personal names. Its behavior underscored the profound cultural differences Baley encountered, where robots were so ingrained in every function that a human performing a simple task like operating a communicator was considered a discourteous disruption to the assigned robot's specialized purpose.