

| Form | Book | Started | Graduated | Notable Member |
|---|---|---|---|---|
| A | 9/1/1985 | 6/30/1992 | (HP-6) | |
| B | 9/1/1986 | 6/30/1993 | (HP-5) Markus F* | |
| C | 9/1/1987 | 6/30/1994 | (HP-4) Percy W | |
| D | 9/1/1988 | 6/30/1995 | (HP-3) Penelope C | |
| E | 9/1/1989 | 6/30/1996 | (HP-2) Fred George W | |
| F | 9/1/1990 | 6/30/1997 | (HP-1) | |
| G | 1 | 9/1/1991 | 6/30/1998 | (HP+0) Harry P |
| H | 2 | 9/1/1992 | 6/30/1999 | (HP+1) Ginny W |
| I | 3 | 9/1/1993 | 6/30/2000 | (HP+2) |
| J | 4 | 9/1/1994 | 6/30/2001 | (HP+3) |
| K | 5 | 9/1/1995 | 6/30/2002 | (HP+4) |
| L | 6 | 9/1/1996 | 6/30/2003 | (HP+5) |
| M | 7 | 9/1/1997 | 6/30/2004 | (HP+6) |
| x | Former member | |||
| u | Year unknown |
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