(of an employee) to clock on (or off); to punch in (or out); (on socia
打 (dá) · 5 strokes
Phonosemantic compound. 扌 represents the meaning and 丁 represents the sound.
卡 (kǎ) · 5 strokes
Origin unclear, but typically explained as being stuck between something above (上) and something below (下). The uses of 卡 to mean "card" or "calorie" are foreign phonetic loans.