Editing IBM AS/400 (section)

=== AS/400 ===
On June 21, 1988, IBM officially announced the Silverlake system as the ''Application System/400'' (AS/400). The announcement included more than 1,000 software packages written for it by IBM and IBM Business Partners.<ref>{{cite web |last1=IBM |title=IBM AS/400 |url=https://www.ibm.com/ibm/history/exhibits/rochester/rochester_4010.html |website=IBM |date=23 January 2003 |publisher=International Business Machines Corporation |access-date=19 March 2022}}</ref> The AS/400 operating system was named ''Operating System/400'' (OS/400).<ref name="schleicher-interview">{{cite interview |last=Schleicher|first=David L.|date=2006-01-24 |interviewer=Arthur L. Norberg |url=https://conservancy.umn.edu/bitstream/handle/11299/107623/oh381ds.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://conservancy.umn.edu/bitstream/handle/11299/107623/oh381ds.pdf |archive-date=2022-10-09 |url-status=live|publisher=Charles Babbage Institute |title=An Interview with DAVID L. SCHLEICHER |website=conservancy.umn.edu|access-date=2021-03-05}}</ref>

The creators of the AS/400 originally planned to use the name ''System/40'', but IBM had adopted a new product nomenclature around the same time, which led to the Application System/400 name.{{sfnp|Soltis|2001|p={{pn|date=October 2023}}}}  First, IBM began prefixing "System" in product names with words to indicate the intended use or target market of the system (e.g., [[Personal System/2]] and [[Enterprise System/9000]]). Second, IBM decided to reserve one- and two-digit model numbers for personal systems (e.g., [[PS/2]] and [[PS/55]]), three-digit numbers for midrange systems (e.g., AS/400) and four-digit numbers for mainframes (e.g., [[ES/9000]]). The reassignment of two-digit model numbers from midrange systems to personal systems was to prevent the personal systems from running out of single-digit numbers for new products.