| SC 13G/A | 2008-02-13 | HANSON PAUL N | COMMUNICATIONS SYSTEMS INC | 120,610,429 | 1.4% | EDGAR |
| SC 13G | 2008-02-13 | BERG JEFFREY K | COMMUNICATIONS SYSTEMS INC | 72,425,808 | 0.8% | EDGAR |
| SC 13G | 2008-02-06 | DIMENSIONAL FUND ADVISORS INC | COMMUNICATIONS SYSTEMS INC | 441,119 | 5.1% | EDGAR |
| SC 13G/A | 2007-11-13 | FMR LLC | COMMUNICATIONS SYSTEMS INC | 124,215 | 1.4% | EDGAR |
| SC 13D/A | 2007-06-07 | GAMCO INVESTORS, INC. ET AL | COMMUNICATIONS SYSTEMS INC | 175,000 | 2.0% | EDGAR |
| SC 13G/A | 2007-02-14 | FMR CORP | COMMUNICATIONS SYSTEMS INC | 688,881 | 7.9% | EDGAR |
| SC 13G/A | 2007-02-13 | HANSON PAUL N | COMMUNICATIONS SYSTEMS INC | 13,234,201 | 1.5% | EDGAR |
| SC 13G/A | 2007-02-13 | SAMPSON CURTIS A | COMMUNICATIONS SYSTEMS INC | 1,195,643,322 | 13.6% | EDGAR |
| SC 13G | 2007-02-13 | SAMPSON WAYNE E | COMMUNICATIONS SYSTEMS INC | 42,450 | 0.5% | EDGAR |
| SC 13G/A | 2006-02-14 | FMR CORP | COMMUNICATIONS SYSTEMS INC | 628,481 | 7.3% | EDGAR |
| SC 13G/A | 2006-02-13 | SAMPSON CURTIS A | COMMUNICATIONS SYSTEMS INC | 119,531,135 | 13.8% | EDGAR |
| SC 13G/A | 2006-02-13 | HANSON PAUL N | COMMUNICATIONS SYSTEMS INC | 13,539,639 | 1.6% | EDGAR |
| SC 13G/A | 2005-02-14 | FMR CORP | COMMUNICATIONS SYSTEMS INC | 823,581 | 10.0% | EDGAR |
| SC 13G/A | 2005-02-14 | SAMPSON CURTIS A | COMMUNICATIONS SYSTEMS INC | 1,523,010 | 17.8% | EDGAR |
| SC 13G/A | 2005-02-14 | HANSON PAUL N | COMMUNICATIONS SYSTEMS INC | 473,155 | 5.5% | EDGAR |
| SC 13G/A | 2004-02-17 | FMR CORP | COMMUNICATIONS SYSTEMS INC | 818,281 | 10.0% | EDGAR |
| SC 13G/A | 2004-02-06 | DIMENSIONAL FUND ADVISORS INC | COMMUNICATIONS SYSTEMS INC | 330,300 | 4.0% | EDGAR |
| SC 13D/A | 2003-11-13 | GABELLI ASSET MANAGEMENT INC ET AL | COMMUNICATIONS SYSTEMS INC | 133,000 | 1.6% | EDGAR |
| SC 13G/A | 2003-02-14 | PUTNAM LLC | COMMUNICATIONS SYSTEMS INC | 497,856 | 6.1% | EDGAR |
| SC 13G/A | 2003-02-13 | SAMPSON CURTIS A | COMMUNICATIONS SYSTEMS INC | 1,554,394 | 18.9% | EDGAR |