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[[File:IBM_370-145_(I198005).jpg|thumb|3 months after the announcement of <br>the 370/155 (and 165)<br> came the Model 145.<ref>{{cite web|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3145.html|title=System/370 Model 145|website=IBM Archives|date=23 January 2003 |publisher=IBM}}</ref><br>Unlike the 155 (or 165), <br>the 145's lack of virtual memory could be rectified with a simple [[microcode]] update from a floppy disk, vs the others needing a hardware upgrade.]]
[[File:IBM_magnetic_disk_drives_3330+3333.png|thumb|The IBM 3330 <br>Direct Access Storage Facility, <br>code-named Merlin, was introduced in June 1970 for use with the IBM System/370. Its removable disk packs could hold 100 MB]]
The '''IBM System/370 Model 155''' (and the [[IBM System/370 Model 165|Model 165]]),<ref name=IBMarc.165>{{cite web|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3165.html|title=System/370 Model 165|website=IBM Archives|date=23 January 2003 |publisher=IBM}}</ref>
were jointly announced Jun 30, 1970<ref name=IBMarc.155>{{cite web|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3155.html|title=System/370 Model 155|website=IBM Archives|date=23 January 2003 |publisher=IBM}}</ref> as "designed for ... the Seventies." That same day [[IBM]] announced the 370/195.<ref group="NB">coming about 14 months after the announcement of the 360/195. Both 195 machines were withdrawn Feb. 9, 1977. see https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP2195.html
and https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3195.html</ref> They were the first three models of the [[IBM System/370]] line of computers.
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