0001078782-17-000825 8-K 2 20170602 4.01 9.01 20170602 20170602 APT Systems Inc 0001543739 8742 990370904 DE 0131 8-K 34 000-54865 17889110 505 MONTGOMERY STREET 11TH FLOOR SAN FRANCISCO CA 94111 (415)-200-1105 505 MONTGOMERY STREET 11TH FLOOR SAN FRANCISCO CA 94111 8-K 1 f8k060217_8k.htm 8K CURRENT REPORT EX-16.1 2 f8k060217_ex16z1.htm EXHIBIT 16.1 RBSM LETTER