Similarly, the output will be even more pleasant at 64 columns:  ``` DEMOS d--- 2019-10-22 20:28 DOCS d--- 2019-10-22 20:28 DOT d--- 2019-10-22 20:28 GAMES d--- 2019-10-22 20:28 MACHINES d--- 2019-10-22 20:28 NEXTZXOS d--- 2019-10-22 20:28 RPI d--- 2019-10-22 20:28 SRC d--- 2019-10-22 20:28 SYS d--- 2019-10-22 20:28 TMP d--- 2019-10-22 20:28 TOOLS d--- 2019-10-22 20:28 CHANGELOG ---- 2019-10-22 10:10 2940 CONTRIBUTING.md ---- 2019-10-22 10:10 9662 LICENSE.MD ---- 2019-10-22 10:10 5186 README.MD ---- 2019-10-22 10:10 1401 TBBLUE.FW ---- 2019-10-22 10:10 172032 TBBLUE.TBU ---- 2019-10-22 10:10 475648 CORES d--- 2019-10-22 20:28 test.bas -a-- 1980-00-00 00:00 212 test.l2 -a-- 1980-00-00 00:00 49280 test.sl2 -a-- 1980-00-00 00:00 49280 test.l2.bak -a-- 1980-00-00 00:00 49280 BUBBBOBB.TAP ---- 2005-04-05 13:07 53224 Bubble Bobble (1987)(Firebird)(48K-128K).tap ``` *Fig. 20 – CAT EXP output in 64 columns* It's evident that the columns are really 4 and they only get broken down in two lines in order to fit. Let's now examine the use of the – switch. If you type: ``` CAT - ``` Your display now will look similar to this: ``` CORES . DEMOS . DOCS . DOT . GAMES . MACHINES. NEXTZXOS. RPI . SRC . SYS . TMP . TOOLS . LICENSE .MD 6K README .MD 2K TBBLUE .FW 168K TBBLUE .TBU 465K 1887M free 0 OK, 0:1 ``` As you can see, filenames are now clearly separated at the 9th character by a dot followed by a 3 letter *type*. In order to demonstrate what happens with a larger filename we could write a simple program and save it as follows: ``` 10 PRINT "Hello World" SAVE "This Is A Hello World Program.bas" ``` Then try both **CAT** and **CAT** - as follows: ``` CAT - "th*.bas": CAT "th*.bas" ``` (Here we're also demonstrating the use of *wildcards* for the first time). Your display will then be: