| Pi | Pi Hsiang Machinery Mfg. Co.( Hsinchu County ) | PI Research Limited |
| PI - Design AG( Triengen ) | PI Hsing Machinery Mfg. Co.( Hsinchu Count ) | Pi Scientific, L.L.C. |
| PI Bear Co., Inc. ( La Crosse, KS ) | PI International Ltd.( Tortola ) | Pi Technology Associates, Inc. ( Anderson, TX ) |
| PI Ceramic GmbH( Lederhose ) | PI International Ltd. ( Tortola, VG ) | PI.EFFE.CI DEI F.LLI Vernasca E C. S.N.C. |
| PI CERAMIC GMBH KERAMISCHE TECH, UND DAUELEMENTE ( Lederhose, DE ) | PI INVESTMENT AG ( Zurich, CH ) | Pia C. Licciardi ( Mountain Lakes, NJ ) |
| Pi Ceramic GmbH Keramische Technologien und Bauelemente( Lederhose ) | PI Manufacturing ( Guelph, Ontario ) | PIA Procede Industriel Automatise Inc.( Montreal ) |
| Pi Ceramic GmbH Keramische Technologien und Bauelemente ( Lederhose, DE ) | Pi Medical ( St. Paul, MN ) | PIAA( Tokyo ) |
| PI Consumer Products Corporation ( Hyannis, MA ) | Pi Medical Inc. ( St. Paul, MN ) | PIAA Corporation( Tokyo ) |
| PI Corporation | Pi Medical, Inc. | PIAA Corporation ( Tokyo, JP ) |
| PI Corporation ( Kirkland, WA ) | PI Medical, Inc. ( St. Paul, MN ) | PIAA Design International Corporation |
| PI Design AG( Jriengen ) | Pi neer Hi-Bred International, Inc. ( Des Moines, IA ) | Piaa Design International Corporation( Tokyo ) |
| PI Design AG( Triengen ) | PI Praktische Informatik GmbH ( Munich, DE ) | Piab AB ( Akersberga, SE ) |
| PI- Design AG( Triengen ) | PI R&D Co., Ltd ( Yokohama-shi, JP ) | PIAB AB( Taby ) |
| PI Electronics | PI R&D Co., Ltd.( Kanagawa ) | PIAB AB ( Taby, SE ) |
| PI Electronics Corp. ( Houston, TX ) | PI R&D Co., Ltd.( Yokohama ) | Piab Sweden AB( .ANG.kersberga ) |
| PI Electronics Pte. Ltd. | PI RD Co., Ltd( Yokohama-shi ) | PIAB USA, INC. ( Hingham, MA ) |
| PI Hsiang Machinery mfg. Co.( Hsinchu ) | PI RD Co., LTD. ( Yokohama-shi, JP ) | |
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