| No TPTP formula. May not be expressible in strict first order. | Media.kif 202-202 | 子類 電郵 and 書面溝通 |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 2921-2921 | 子類 電郵 and DoNetworkMessaging |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 2927-2927 | 子類 ReceivingEmail and 電郵 |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 2932-2932 | 子類 SendingEmail and 電郵 |
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