Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Number Nine Visual Technology
Table title:
Number Nine Video Cards using Number Nine GPUs
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > #9 Model </th><th colspan=1 rowspan=1 > #9 GPU </th><th colspan=1 rowspan=1 > Memory </th><th colspan=1 rowspan=1 > PC Bus Architecture </th></tr>
<tr> <td colspan=1 rowspan=1 > Imagine 128 </td><td class="highlighted"  colspan=1 rowspan=1 > Imagine 128 </td><td colspan=1 rowspan=1 > 4M, 8M VRAM </td><td colspan=1 rowspan=1 > PCI </td></tr>
<tr> <td colspan=1 rowspan=1 > Imagine 128 Series 2 </td><td class="highlighted"  colspan=1 rowspan=1 > Imagine 128-II </td><td colspan=1 rowspan=1 > 4M, 8M H-VRAM </td><td colspan=1 rowspan=1 > PCI </td></tr>
<tr> <td colspan=1 rowspan=1 > Imagine 128 Series 2e </td><td class="highlighted"  colspan=1 rowspan=1 > Imagine 128-II </td><td colspan=1 rowspan=1 > 4M EDO DRAM </td><td colspan=1 rowspan=1 > PCI </td></tr>
<tr> <td colspan=1 rowspan=1 > Revolution 3D </td><td class="highlighted"  colspan=1 rowspan=1 > T2R </td><td colspan=1 rowspan=1 > 4M or 8M (base), 12M, 16M WRAM </td><td colspan=1 rowspan=1 > PCI, AGP </td></tr>
<tr> <td colspan=1 rowspan=1 > Revolution IV </td><td class="highlighted"  colspan=1 rowspan=1 > T2R4 </td><td colspan=1 rowspan=1 > 16M, 32M SDRAM </td><td colspan=1 rowspan=1 > PCI, AGP </td></tr>
<tr> <td colspan=1 rowspan=1 > Revolution IV-FP </td><td class="highlighted"  colspan=1 rowspan=1 > T2R4 </td><td colspan=1 rowspan=1 > 32M SDRAM </td><td colspan=1 rowspan=1 > PCI, AGP </td></tr>
</table>
Question:
What generations did the Imagine series go through?
Answer:
The Imagine series went through two generations: Imagine 128 and Imagine 128-II.