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''[[http://www.phdcomics.com/comics.php PHD]]'' ([[FunWithAcronyms Piled Higher & Deeper]]) is a webcomic by Jorge Cham [[WebcomicsLongRunners that has been running since 1997]].

The comics depict the typical life of graduate students in Stanford University: how they obsess about ever getting their theses completed, struggle to make ends meet with their meager stipends, wonder why life is passing them by, and slack off while their supervisors aren't looking.

[[Characters/{{PHD}} Now has a character page.]]
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!!Contains examples of:

* AbsentMindedProfessor: Almost all of the Research Advisors introduced. They can barely remember the students' name, and hardly ever bother to read their thesis draft.
* AcceptableTargets: [[invoked]] Since the comics are drawn from the perspective of grad students, it frequently makes fun of research advisers and undergrads.
%%* TheAce: The "Golden Boy".
* AddedAlliterativeAppeal: [[http://www.phdcomics.com/comics/archive.php?comicid=1443 Publish and/or Perish!]]
* AllIssuesArePoliticalIssues: [[GranolaGirl Tajel]] often carries protest signboards for various causes.
* AmbiguouslyBrown: Dee's friend has a dark skin, but he has no name or distinctive features to determine his actual race (unlike Tajel, who we know is half-Indian from her mother).
* ArtEvolution: Obviously, considering the sheer length of time its been running. Still, just compare the art change over the years. Still, just look at the difference between [[http://www.phdcomics.com/comics/archive.php?comicid=1 the first strip]] and [[http://www.phdcomics.com/comics/archive.php?comicid=1516 a recent one.]]
* BaitAndSwitchComparison: [[http://www.phdcomics.com/comics/archive.php?comicid=1447 Occupy Wall Street.]]
* BreadEggsBreadedEggs: The "How You Spend Your Time" pie chart has a Sports & Leisure section which consist of surfing the internet, doing sports, and reading about sports while surfing the Internet.
* BrickJoke: The protagonist's [[http://www.phdcomics.com/comics/archive.php?comicid=1423 travel reimbursement form]], which shows up again [[http://www.phdcomics.com/comics/archive.php?comicid=1477 over a year later]].
* CallBack: Mike teaches the protagonist how to distract with graphs, which unfortunately doesn't work too well for him. Mike himself does it over a year later, with more success.
* CharacterizationMarchesOn:
** When we see Tajel interact with Prof. Rivera for the first time, he was lamenting her lack of apparent seriousness in her studies, especially when she chose to write about "The Grad student of Academia" for her research topic. Nowadays, their dynamics are reversed, as Rivera becomes the most egregious example of AbsentMindedProfessor who never reads Tajel's draft and gives her useless advice, while Tajel desperately tries to get his support in writing her thesis.
** Professor Smith changed too. Originally he was TheFaceless, then started to become more of an AbsentMindedProfessor who tries to blend in with the students despite being clueless of their trends. Later, he just became a professor with a serious LackOfEmpathy.
* ChildProdigy: Professor Jones's daughter is only first year elementary school, but is intelligent enough to fix Mike's research data.
* ClassReunion: Cecilia goes to her 10-year high school reunion in [[http://www.phdcomics.com/comics/archive.php?comicid=268 this]] story arc.
* ComicBookTime: Every year, the strip features the characters celebrating birthdays, summer vacations and various holidays, but despite their constant complains that they're never graduating, they never seem to actually age. Cecelia lampshades this in one of her birthday strips, in which she decided that the time she spends in grad school doesn't count to her age, because it's basically living in a vacuum.
* ChuckCunninghamSyndrome:
** Scott all but disappeared from the storyline after he broke up with Cecilia.
** PlayedForLaughs with Gerard, the token Humanities student, who was told by the PHD Comics management that he should either change his major or leave the comics altogether. He was then forced to attend a hearing to justify his existence, and had not appeared ever since.
* CueTheFlyingPigs: [[http://www.phdcomics.com/comics/archive.php?comicid=590 An actual flock of flying pigs were seen over the campus]], while Hell freezes over when it was revealed that Mike might actually graduate.
* CutenessOverload: Most of the campus faculty practically melts at the sight of Mike's baby daughter, Sophie. He exploits this to distract them while he steals food from associations he doesn't belong to.
* DivergentCharacterEvolution: In the [[EarlyInstallmentWeirdness earlier strips]], all the University professors were portrayed as a collective group of sinister, faceless HiveMind who goes out their way to make the students' lives more difficult, especially during Quals. Now, they're mostly given distinct appearance and personalities: Professor Smith is still the mean SternTeacher, Professor Jones tries to be helpful but is often scatterbrained, Professor Rivera is very flippant and easygoing, but doesn't really pay attention to what his students are doing.
* EducationThroughPyrotechnics: The machines used for experimental research frequently blow up in people's faces.
* TheFaceless: Most of the research advisors don't get drawn in the comic panels, at least in the earlier strips. No longer the case since the 2003 strips.
* FailureIsTheOnlyOption: To keep going, the series needs the characters to remain grad students, meaning they have to postpone the completion of their respective theses indefinitely. Mike ultimately subverts this; having been the oldest grad student for several years, he finally manages to finish his dissertation after of procrastination and graduate, but stays anyway as a member of the teaching staff.
* FunWithAcronyms: Of course, the strip title (though that itself is an old joke). And [[http://www.phdcomics.com/comics/archive.php?comicid=1100 this strip]] has a how-to guide!
* GagSeries: The main point of the strips are to make jokes about the life (or lack thereof) of a grad student, and make fun of the research advisors and Academia in general. When the strips briefly went for a more detailed plot and character development, some readers actually complain.
%%* HeroicBSOD: [[http://www.phdcomics.com/comics.php?f=1383 Literally]].
* IgnoredEpiphany: ''[[Literature/AChristmasCarol A Smithmas Carol]]'' ends with Smith reflecting on his life's journey and concluding with this:
-->'''Prof. Smith:''' Eh, who cares? I've got tenure.
* LimitedWardrobe: Probably justified considering how cash-strapped the characters are. In any case, they are almost always depicted in the same outfits.
* LivingProp: Discussed in-universe regarding the status of grad students. Apparently, the faculty would be more likely to notice an actual missing furniture than they would a missing student.
* MetaGuy: Gerard, the Humanities student RecurringCharacter, only exists to represent another Grad School department apart from engineering. He's definitely aware of this, and most of his appearances have him address the readers in some way.
* MiseryPoker: A humorous variation took place during the ''[=PhD=] widows'' meeting between Scott and Jenny as they ranted on their respective partners, Cecelia and Mike.
--> '''Scott:''' Cecelia seems to have lost her way... She has a lot of work ethic but lacks purpose.
--> '''Jennifer:''' My husband, on the other hand, has a baby on the way, but his work is pathetic and slacks on purpose.
* MoodWhiplash: [[http://www.phdcomics.com/comics/archive.php?comicid=1162 Tales from the Road - MD Anderson Cancer Center]]. It starts off as a typical lighthearted 'Tales From The Road', then in the last section, turns into depressing stories about cancer, ending with a former grad student who was diagnosed thanking him for making them laugh, with the reply "I guess we all do what we can."
* TheMovie: Yes, [[http://www.phdcomics.com/movie/index.php there is one.]]
* NotThatKindOfDoctor: No one is studying to become physicians.
** TruthInTelevision: In [[http://www.phdcomics.com/comics/archive.php?comicid=1244 this strip]] the author recounts a time when he was detained by British border agents on the grounds that he didn't qualify as an academic visitor.
--> Jorge Cham: "But I have a Ph.D.! I'm giving lectures at universities! I have a Ph.D.!"
--> Border Agent: "Sorry. The rules say doctors are allowed in, but you're not a ''real doctor'', are you?"
--> [=*=][[NotMakingThisUpDisclaimer He ''actually'' said this.]]
* ObstructiveBureaucrat: Faced by Mike when submitting his thesis (he has to come back because the layout isn't in perfect conformity with university rules), by Tajel when applying for a visa, and by the main character when trying to get reimbursed for travel.
* OverlyLongScream: The main character managed to scream for "[[http://www.phdcomics.com/comics/archive/phd112706s.gif one week and counting]]" after he discovered that someone else had written about his research topic.
* PercussiveMaintenance: [[http://www.phdcomics.com/comics/archive.php?comicid=771 For the cutting-edge lab equipment]].
* RecurringCharacter: Scott. He's Cecelia's boyfriend, but since he's not a Stanford student, he is actually featured less frequently than the nameless {{Living Prop}}s that are the Engineering Grad students. Lampshaded by Tajel when he suddenly shows up after a long absence.
-->''"Scott? I feel I haven't seen him in years''
* RhymesOnADime: A lot of the comics' punchlines come from characters bantering with each other in rhymes. One example is the MiseryPoker mentioned earlier, and another is the following exchange between Cecelia and her advisor.
--> '''Cecelia:''' I have to reference... without deference?
--> '''Prof. Jones:''' That's the preference.
* RightInFrontOfMe: Upon meeting Khumalo, Tajel starts chatting him up without realizing that he's her new professor.
* RunningGag: π/2
* ShoutOut: [[Film/TheSixthSense I see]] [[http://www.phdcomics.com/comics/archive.php?comicid=1448 post-docs!]]
* SkewedPriorities: Mike can remember "important stuffs" like who is the colorist for a particular ''ComicBook/XMen'' issue, but forgets to take Quals, which he needed to graduate.
* TheSlacker: While several characters are slackers to some extent, Mike Slackenerny stands head and shoulders above the rest in this regard. An eternal student, he's the ''[=PhD=]'' answer to ''ComicStrip/{{Doonesbury}}'''s Zonker Harris.
* SpitTake: Cecilia is prone to do this.
** [[http://www.phdcomics.com/comics/archive.php?comicid=1123 When Tajel tells her she's getting married]], she deliberately took a gulp from her drink so that she can spray it out in surprise.
** She also accidentally spurts her drink on Scott when the latter mentioned that he had a job offer in London.
* StarvingStudent: All of the students, who lives off instant ramen, and spends a lot of their time scavenging for free food.
* StatusQuoIsGod: No matter what happened over the events of the comics, nothing about the characters' dynamic and troubles would really change.
** Mike finally graduated from his Ph.D, but he continues to stick around the campus as a Post-Doc whose activities mostly involve sleeping, napping and scavenging for free food.
** Prof. Rivera left Stanford for a position in another University, but continues to serve as Tajel's adviser. Since he barely communicate with his student or give her useful advice anyway, his departure has no virtually effect to her thesis.
* StillGotIt: Prof. Smith when he finds out he can still take a nap balanced on a chair, as he used to do as a grad student.
* TakeThat:
** [[http://www.phdcomics.com/comics.php?f=1156 This strip]] pokes fun at TV shows that get the science wrong. [[http://www.phdcomics.com/comics/archive.php?comicid=1391 This strip]] does the same to movies that also get the science wrong.
** Though the supposed take that at Series/{{Mythbusters}} makes it abundantly clear that [[ShallowParody he's never actually watched it]].
** And now [[http://www.phdcomics.com/comics/archive.php?comicid=1452 this strip]] at channels that claim to be focused on science.
* VagueAge: No one really knows how old any of the characters are, since most of them are grad students who have spent countless of years in their program and not showing any signs of graduating soon, despite their constant lament that they're getting older and older as the years goes by. And given that Mike's baby daughter visibly ages over time, the setting probably ''doesn't'' run on ComicBookTime.
* WalkingTechbane: As shown in [[http://www.phdcomics.com/comics/archive.php?comicid=821 this strip]], research advisors have the uncanny ability to make any project malfunction in their close vicinity.
* WholePlotReference: A couple of the 1999 strips were parodies of several movies that came out that year.
** [=PhD=] - Episode 1 is based on ''Film/ThePhantomMenace''.
** ''What is... The Thesis?'' is from ''Film/TheMatrix''.
** ''Raiders of the lost dissertation'' is ''Film/RaidersOfTheLostArk''.
* WeddingDay: Tajel and Khumalo's wedding.
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