计算机可读

• 言(word; speech)RADICAL
• 十(ten)PHONETIC

Calculation is using words to count numbers one by one.

• ⺮(bamboo (radical))RADICAL
• 具(tool; implement)PHONO-SEMANTIC

Ancient calculation used bamboo sticks as a tool to count numbers.

• 口(mouth; opening)RADICAL
• 丁(man; adult male)PHONETIC

A mouth uttering words of approval with a sound like "ding" gives you the character meaning "can" or "able."

• 言(speech; words)RADICAL
• 賣(sell; vend)PHONO-SEMANTIC

Reading a book is using spoken words to 'sell out' knowledge to the listener.