| ID | Name | Type |
|---|---|---|
| #8105 | Klaus Klippert | + |
| #8106 | Klaus Kupfernagel | + |
| #8107 | Klaus Menzel | + |
| #20410 | Klaus Nowatzki | + |
| #8108 | Klaus Puth | + |
| #22849 | Klaus Raack | + |
| #8109 | Klaus Schroder | + |
| #8110 | Klaus Schulte-Austum | + |
| #8111 | Klaus-Dieter Kaufmann | ? |
| #8112 | Klav | ? |
| #8113 | Klett | ? |
| #8114 | Klim | ? |
| #8115 | Klopov Yuri | + |
| #8116 | Klub Fifo | ? |
| #8118 | Kluwer Technische Boeken B.V. | Z |
| #8119 | Knaur | ? |
| #8120 | Knight Books | Z |
| #8121 | Knight's | ? |
| #8122 | Knighted Computers | Z |
| #8123 | Knightsoft | M |