| 2017.04.09 | | A text was added to the page of the "Options Part 1". |
| 2015.03.03 | | A text was added to the page of the "Options Part 2". |
| 2015.01.09 | | A Picture added to the page of the "Pictures". |
| 2014.12.11 | | A text was added to the page of the "5540". |
| 2014.12.07 | | A text was added to the page of the "5550". |
| 2005.09.27 | | A text was added to the page of the "POS System". |
| 2005.08.04 | | The page of "POS System" was added to "Others". |
| 2005.08.02 | | A Picture added to the page of the "Pictures". |
| 2004.03.09 | | A Picture added to the page of the "On-line Terminal".
Pictures added to the page of the "Pictures". |
| 2003.06.17 | | The page of "Pictures" was added to "Others". |
| 2003.06.08 | | A text was added to the page of the "5551-G06". |
| 2003.05.06 | | The page of "5551-G06" was added to "Others". |
| 2003.04.11 | | The page of "Word processor" was added to "Software". |
| 2003.04.03 | | A text was added to the page of the "Options Part 2". |
| 2003.03.23 | | The page of "On-line Terminal" was added to "Others". |
| 2003.03.12 | | "Multi-Station" was changed into "Multistation" which is a formal notation. |
| 2003.03.09 | | The layout of index page was changed. |
| 2003.03.07 | | A text was added to the page of the "The characteristics of the software".
A text was added to the page of the "Operating System". |
| 2003.03.05 | | The page of "5499 On-line Note" was added to "Others". |
| 2003.02.25 | | Pictures added to the page of the "5535-M18". |
| 2003.02.23 | | The page of "Development Language" was added to "Software". |
| 2003.02.11 | | The pictures of system unit was added.
The page of "Diagram" was added to "Hardware". |
| 2003.02.09 | | A text was added to the page of the "5535-M18". |
| 2003.02.06 | | A text was added to the page of the "5535".
A text was added to the page of the "Options Part 2".
The page of "Japanese processing" was added to "Software". |
| 2003.02.05 | | The page of "5535-M18" was added to "Others".
The page of "Options Part 2" was added to "Hardware". |
| 2003.02.03 | | The layout of index page was changed. |
| 2003.02.01 | | A text was added to the page of the "Architecture". |
| 2003.01.23 | | The page of "Options Part 1" was added to "Hardware". |
| 2003.01.19 | | Added the "Document Creation" page to the Japanese software page. |
| 2003.01.15 | | The English variant have been published. |
| 2003.01.13 | | The Japanese variant have been published. |
| Jan 2003 | | Started creating the individual pages. |
| Dec 2002 | | Materials were arranged in order to create the pages. |