| Listening | CODE 1 | code 2 | CATEGORY | No. |
| O = orange | first letter of author's last name | Toddler board books | 31 | |
| O= orange - seasons/holidays | name of the season/holiday | Picture books - seasonal | ||
| G = green | first letter of author's last name | Picture books - basic | ||
| P = purple | first letter of author's last name | Picture books - advanced | ||
| P/FT = purple/folk or fairy tale | first letter of author's last name | |||
| C | first letter of author's last name | Picture book with cassette | ||
| CD | first letter of author's last name | Picture book with CD | ||
| V | first letter of author's last name | Picture book with video |