17. The pen input processing apparatus as set forth in claim 16, further comprising: second memory means for temporarily storing interrupting data from said inputting means, and for temporarily storing interrupting key data from said keyboard means.
17. The pen input processing apparatus as set forth in claim 16, further comprising: second memory means for temporarily storing interrupting data from said inputting means, and for temporarily storing interrupting key data from said keyboard means. 18. The pen input processing apparatus as set forth in claim 17, wherein said key input nullifying means includes: means for reading the data out of said second memory means, and for judging whether the data is the interrupting data or the interrupting key data; and informing means for informing an error when the data is the interrupting key data and the editing processing is carried out in accordance with the handwritten input.