<SEC-DOCUMENT>0001258897-18-001147-index.html : 20180209 <SEC-HEADER>0001258897-18-001147.hdr.sgml : 20180209 <ACCEPTANCE-DATETIME>20180209083113 ACCESSION NUMBER: 0001258897-18-001147 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20180209 DATE AS OF CHANGE: 20180209 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: COMMUNICATIONS SYSTEMS INC CENTRAL INDEX KEY: 0000022701 STANDARD INDUSTRIAL CLASSIFICATION: TELEPHONE & TELEGRAPH APPARATUS [3661] IRS NUMBER: 410957999 STATE OF INCORPORATION: MN FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-33776 FILM NUMBER: 18588068 BUSINESS ADDRESS: STREET 1: 10900 RED CIRCLE DRIVE CITY: MINNETONKA STATE: MN ZIP: 55343 BUSINESS PHONE: 9529961674 MAIL ADDRESS: STREET 1: 10900 RED CIRCLE DRIVE CITY: MINNETONKA STATE: MN ZIP: 55343 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: DIMENSIONAL FUND ADVISORS LP CENTRAL INDEX KEY: 0000354204 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 222370029 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 BUSINESS PHONE: (512) 306-7400 MAIL ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 FORMER COMPANY: FORMER CONFORMED NAME: DIMENSIONAL FUND ADVISORS INC DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G/A <SEQUENCE>1 <FILENAME>dfs293.htm <DESCRIPTION>SCHEDULE 13G/A <TEXT> Document 1 - file: dfs293.htm
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