The ThinkCentre M55 received a positive review from PC World, with the reviewer stating that 'The Lenovo ThinkCentre M55 9BM is a compact and quiet business PC that keeps maintenance simple and makes upgrades easy. The ThinkCentre M55, M55p, and M55e were announced by Lenovo in September 2006. The M52 desktop was equipped with a 3 GHz Pentium 4 processors, an 80 GB hard disk drive, up to 4 GB of RAM, eight USB 2.0 ports, two serial ports, a Gigabit Ethernet connection, VGA output, and a chassis that did not require tools to open − a toolless chassis. PC World called the M52 desktop, 'A corporate machine for the security conscious business user looking for stability and reliability'. The ThinkCentre M52 desktop was announced in May 2005 following Lenovo's acquisition of IBM's Personal Computing Division. The ThinkCentre desktop released by Lenovo in 2005, following its acquisition of IBM's PCD was the M52. While the desktop was made available as a consumer PC, it was more suited to a corporate environment, with the limited storage and graphics capabilities.

Operating system: Microsoft Windows XP Professional.Audio: SoundMAX Cadenza audio without speakers.Graphics: Intel Extreme 2 (integrated, 64MB of shared video RAM).The desktop offered the following specifications: The first desktop in IBM's redesigned ThinkCentre line was the M50, announced in 2003.

The first desktop released was an M-series desktop – the M50. In 2003, IBM redesigned and re-launched their ThinkCentre product line.

14 Product Specifications Reference (historical entries).

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