(Giving age away here) I've been working with computers long enough that you had to run 'Sideways' on Lotus 123 to get it to print in landscape mode. The biggest disc partition DOS would make was 32 megabyte... The computer used an SSDD floppy disc with no hard drive, so I configured DOS to create a virtual RAM disk to mimic the single floppy drive to enable copying a file.
Moved up to a PC on Windows 3.1 network hooked to an IBM network with reel and cartridge drives.
Next stop was running an IBM sysplex with 2 z990into T-Rex and 2 z900 mainframes tied into DASD arrays with over 15k Petabytes and a tape cartridge library with over 450k 3490 tape cartridges. Tie that into a StorageTek LSM system with 19 silos (robots) and a lan network with over 40k terminals. Linux? Try Rs-6000s running it - about 10 of those. WORM platters, DLT libraries, etc. 3 of us watched 34 monitors at one time on 12 hour shifts....
Now I are a COBOL programmer in charge of over 300 data tables and various programs and procs for child support and a system support backup person. Working with TSO, ISPF, JCL, DB2, SQL, MVS, Telon, IMS, etc.....
Planning on retiring at the end of 2018 before the system we run is replaced on servers and moved off the mainframes.
I liked Red Hat and SuSe Linux, running both of those on my own servers. Even ran Openserver 5.0.5 Enterprise Edition UNIX on one of my machines. Awesome OS!
Now I'm playing on an iPad entering this... LOL