model     memory ( ram )                       storage ( flash )   operating system version                 memory card           weight , dimensions retail availability
0                                        770              64 mb                                  128 mb  os2005 / 6 , os2007 / 8he          1 rs - mmc slot ii          230 g , 141x79x19 mm       november 2005
1                                       n800             128 mb                                  256 mb                 os2007 / 8      2 x sd slots with sdhc  206 g , 144x75x13 ( / 18) mm        january 2007
2                                       n810             128 mb                  256 mb + 2 gb internal                     os2008   1 x minisd slot with sdhc          226 g , 128x72x14 mm        october 2007
3                         n810 wimax edition             128 mb                  256 mb + 2 gb internal                     os2008   1 x minisd slot with sdhc          229 g , 128x72x16 mm          april 2008
4  n900 (not marketed as an internet tablet)             256 mb                 256 mb + 32 gb internal                    maemo 5  1 x microsd slot with sdhc        181 g , 110.959.818 mm       november 2009
5    n9 (not marketed as an internet tablet)  1 gb (mobile ddr)  512 mb internal + 16 or 64 gb on board        meego 1.2 harmattan         no memory card slot   135 g , 116.45x61.2x12.1 mm      september 2011

Table as JSON:
{"model":{"0":"770","1":"n800","2":"n810","3":"n810 wimax edition","4":"n900 (not marketed as an internet tablet)","5":"n9 (not marketed as an internet tablet)"},"memory ( ram )":{"0":"64 mb","1":"128 mb","2":"128 mb","3":"128 mb","4":"256 mb","5":"1 gb (mobile ddr)"},"storage ( flash )":{"0":"128 mb","1":"256 mb","2":"256 mb + 2 gb internal","3":"256 mb + 2 gb internal","4":"256 mb + 32 gb internal","5":"512 mb internal + 16 or 64 gb on board"},"operating system version":{"0":"os2005 \/ 6 , os2007 \/ 8he","1":"os2007 \/ 8","2":"os2008","3":"os2008","4":"maemo 5","5":"meego 1.2 harmattan"},"memory card":{"0":"1 rs - mmc slot ii","1":"2 x sd slots with sdhc","2":"1 x minisd slot with sdhc","3":"1 x minisd slot with sdhc","4":"1 x microsd slot with sdhc","5":"no memory card slot"},"weight , dimensions":{"0":"230 g , 141x79x19 mm","1":"206 g , 144x75x13 ( \/ 18) mm","2":"226 g , 128x72x14 mm","3":"229 g , 128x72x16 mm","4":"181 g , 110.959.818 mm","5":"135 g , 116.45x61.2x12.1 mm"},"retail availability":{"0":"november 2005","1":"january 2007","2":"october 2007","3":"april 2008","4":"november 2009","5":"september 2011"}}