| Name | Count | Years active |
|---|---|---|
| Reed Business Publishing | 39 | 1987-1999 |
| Reed Business Information | 17 | 1996-2004 |
| IPC Transport Press | 10 | 1976, 1978-1982 |
| Electrical Times | 6 | 1973, 1975, 1981, 1983, 1990-1991 |
| Reed Business | 6 | 1987, 1989, 1991-1992, 1995, 2004 |
| Chemical Data Services, IPC Industrial Press | 6 | 1976, 1978-1981 |
| Business Press International | 5 | 1984-1986 |
| IPC Industrial Press | 4 | 1974, 1981-1982 |
| Simon and Schuster | 4 | 1969, 1975 |
| Reed Business Publishing Ltd | 4 | 1987-1988, 1995 |