4000 series (disambiguation)

4000 series is an industry-standard family of integrated circuits.

4000 series may also refer to:

Japanese train types

 * Meitetsu 4000 series electric multiple unit
 * Odakyu 4000 series electric multiple unit
 * Seibu 4000 series electric multiple unit
 * Tokyu 4000 series electric multiple unit
 * Yokohama Municipal Subway 4000 series electric multiple unit

Other uses

 * Avaya ERS 4000 series, a series of Ethernet routers
 * Avaya VSP 4000 series, a series of Ethernet routers
 * Busan Transportation Corporation 4000 series people mover for the Busan Metro
 * CTA 4000 series, a series of Chicago "El" rolling stock
 * GEC 4000 series, a series of minicomputers
 * HP LaserJet 4000 series, a series of printers
 * International 4000 series, a series of trucks
 * International 4000 series (1989), a series of trucks
 * Port Authority 4000-series PCC, a series of streetcar
 * Radeon HD 4000 series, a series of graphics processing unit
 * Seoul Metro 4000 series, a series of Seoul Metro train.