1) Abbreviation: WS
2) File extension: .WK1 (LDC; Lotus 1-2-3), .WKE (LDC; Lotus 1-2-3), .WKS (LDC; Lotus 1-2-3), .wk1 (file name extension, Lotus 1-2-3, LDC), .wke (file name extension, Lotus 1-2-3, LDC), .wks (file name extension, Lotus 1-2-3, LDC), GSW (GraphShow), MS (Maple)
Универсальный русско-английский словарь. Академик.ру. 2011.