# IBM PS/2 Model 55 SX > 1987 IBM desktop computer **Wikidata**: [Q128790424](https://www.wikidata.org/wiki/Q128790424) **Wikipedia**: [English](https://en.wikipedia.org/wiki/IBM_PS/2_Model_55_SX) **Source**: https://4ort.xyz/entity/ibm-ps-2-model-55-sx ## Summary The IBM PS/2 Model 55 SX is a 1987 desktop computer manufactured by IBM, part of the Personal System/2 (PS/2) series. It is classified as a general-purpose device for performing arithmetic or logical operations, reflecting its role in the mid-1980s computing landscape. ## Key Facts - **Instance of**: Computer (a general-purpose device for arithmetic or logical operations). - **Manufacturer**: IBM, an American multinational technology corporation founded in 1911. - **Year of introduction**: 1987. - **Logo**: [IBM PS/2 Model 55 SX badge logo](https://commons.wikimedia.org/wiki/Special:FilePath/IBM_PS-2_Model_55_SX_badge_logo.svg). - **Image**: [Front view of IBM PS/2 Model 55 SX](https://commons.wikimedia.org/wiki/Special:FilePath/Ibm_8555-401_front.jpg). - **Wikipedia title**: IBM PS/2 Model 55 SX. - **Commons category**: IBM PS/2 Model 55 SX. - **Wikipedia languages**: Available in English and Commons. ## FAQs ### Q: What was the IBM PS/2 Model 55 SX used for? A: The IBM PS/2 Model 55 SX was a general-purpose desktop computer designed for arithmetic and logical operations, typical of mid-1980s computing applications. ### Q: Who manufactured the IBM PS/2 Model 55 SX? A: The IBM PS/2 Model 55 SX was manufactured by IBM, a multinational technology corporation founded in 1911. ### Q: When was the IBM PS/2 Model 55 SX released? A: The IBM PS/2 Model 55 SX was introduced in 1987. ### Q: What is the significance of the IBM PS/2 Model 55 SX? A: The IBM PS/2 Model 55 SX is notable as part of IBM’s PS/2 series, which marked a transition in IBM’s hardware design and contributed to the evolution of desktop computing in the late 1980s. ### Q: Where can I find more information about the IBM PS/2 Model 55 SX? A: Additional details can be found on its [Wikipedia page](https://en.wikipedia.org/wiki/IBM_PS/2_Model_55_SX) and in the [Commons category](https://commons.wikimedia.org/wiki/Category:IBM_PS/2_Model_55_SX). ## Why It Matters The IBM PS/2 Model 55 SX holds historical significance as part of IBM’s Personal System/2 (PS/2) series, which introduced a new design philosophy for IBM’s desktop computers. Released in 1987, it represented a shift from the earlier IBM Personal Computer (PC) models, incorporating advanced features and a more modular architecture. The PS/2 series was notable for its use of Micro Channel Architecture (MCA), which improved performance and expandability compared to the Industry Standard Architecture (ISA) used in earlier IBM PCs. This model, like others in the series, played a role in shaping the desktop computing landscape of the late 1980s and early 1990s, influencing both IBM’s product strategy and the broader industry’s adoption of new hardware standards. Its legacy continues to be studied in the context of IBM’s transition from mainframe dominance to a more diversified technology portfolio. ## Notable For - **Part of the PS/2 series**: The IBM PS/2 Model 55 SX was a key member of IBM’s Personal System/2 lineup, marking a significant evolution in IBM’s desktop computing offerings. - **Micro Channel Architecture (MCA)**: The model featured MCA, a bus architecture that improved performance and expandability over the ISA used in earlier IBM PCs. - **1987 release**: Introduced in 1987, it reflected IBM’s efforts to modernize its hardware design in response to competitive pressures. - **Modular design**: The PS/2 series, including the Model 55 SX, emphasized a more modular and integrated approach to desktop computing. - **Historical context**: The Model 55 SX is part of IBM’s broader transition from mainframe computing to a more diverse technology portfolio. ## Body ### Overview The IBM PS/2 Model 55 SX is a desktop computer introduced in 1987 as part of IBM’s Personal System/2 (PS/2) series. It is classified as a general-purpose device for arithmetic and logical operations, typical of mid-1980s computing applications. ### Manufacturer and Release - **Manufacturer**: IBM, a multinational technology corporation founded in 1911. - **Release year**: 1987. ### Design and Architecture - **Bus architecture**: The Model 55 SX featured Micro Channel Architecture (MCA), which improved performance and expandability compared to the Industry Standard Architecture (ISA) used in earlier IBM PCs. - **Modular design**: The PS/2 series, including the Model 55 SX, emphasized a more modular and integrated approach to desktop computing. ### Significance - **Part of the PS/2 series**: The Model 55 SX was a key member of IBM’s PS/2 lineup, marking a significant evolution in IBM’s desktop computing offerings. - **Historical context**: The model reflects IBM’s efforts to modernize its hardware design in response to competitive pressures and industry trends. ### Media and Documentation - **Logo**: [IBM PS/2 Model 55 SX badge logo](https://commons.wikimedia.org/wiki/Special:FilePath/IBM_PS-2_Model_55_SX_badge_logo.svg). - **Image**: [Front view of IBM PS/2 Model 55 SX](https://commons.wikimedia.org/wiki/Special:FilePath/Ibm_8555-401_front.jpg). - **Wikipedia**: [IBM PS/2 Model 55 SX](https://en.wikipedia.org/wiki/IBM_PS/2_Model_55_SX). - **Commons category**: [IBM PS/2 Model 55 SX](https://commons.wikimedia.org/wiki/Category:IBM_PS/2_Model_55_SX).